I dig Twitter and use it a lot to stay in touch with friends and chat, but recently I've been noticing that if I mention certain words or phrases that I get "@" replies from people I don't know, generally trying to sell me things or convince me to visit their Web site. I don't want this spammy pollution in my twitterstream. Can I report them as spammers if I'm using the Twitter app on my iPhone?

I'm a big fan of Twitter, but notice that sometimes when I tweet about certain topics I find that spammers and other people reply to me with @replies, just trying to get me to visit their sites. It's very spammy and stinks. I go to twitter.com in my Web browser: is there any way to report a twitter user as spam on the site?

How can I cut off a site that keeps sending porn content to me. I have clicked on the unsubscribe link but it still keeps coming. Please help.

I keep getting email from different organizations claiming that if I join their auction I could buy an iPad for $20 or less, or even win one for the cost of entering the sweepstakes! Tempting, but do ya think it's legit, Dave?

I hate spammers! Stupid jerks waste so much of my time and clog up my mailbox with their stupid messages. I think it should justify the death penalty! Now I'm getting spam from Yahoo Groups where people are automatically adding me to their spammy groups without my permission? WTF? Is there some way to prevent Yahoo Groups spam?

I'm trying to set up a selective Gmail filter so that mail sent from a specific mailing list is also forwarded along to a secondary address, but Gmail says I need to verify my other "forwarding" email address. Help!?

The latest upgrade in Windows Hotmail has gone ahead and removed the View Message Source from the right-click context menu in the Inbox! I have always found that to be a valuable and critical tool in filtering out /previewing potentially risky e-mails without ever having to actually open them.

Why on earth would MS disarm their Hotmail account users in this day and age in the battle against scams/spams/phishing and all other sorts of nefarious exploits!?!?

I get all sorts of spam from my Microsoft Live.com membership. I just want to keep my Hotmail account active since I've had it since I was in high school, but I don't want to have to weed through all these promo messages, etc. Can I turn these off? I know there used to be a way...

Hi, my name is Lori and my friend, Pegah, has found out that her hotmail account has sent out emails to all of her contacts without her knowing. The email says: "Hey How are you doing? I ordered a white 3GS Apple iPhone from a good website -- [[link removed]] -- much cheaper but brand new and genuine! You can check it if you would like. Cheers".

What can she do to stop this?

She is scared to use her computer right now and so I am emailing for her. She said that the last time she used her hotmail was Wed, March 10th. She was not asked for her password today when she tried to go into it. Please help - she is really worried. I received the above email from Pegah to my Yahoo account and the date shown was Thurs, March 11th @ 10:28PM.

My friend keeps sending messages to my Yahoo Mail account, but I can't even find them. What's the story? He's thinking that maybe they're ending up in the spam folder, but I don't know how to check for that. Can you help me out, please?

My system administrator is telling me that I need to add a "capcha" [actually, it's "captcha"] system to my site so that I get less spam. What's a captcha system and why would I want it?

I'm a German national who lives in the Philippines for more than 17 years. I use Gmail for a long time already and I really like it. No problems so far. Just a couple of days back, though, my brother in Germany who also has a Gmail account told me that he receives more than 100 spams a day whereas I get at the most 2 or 3 a month. Can you please give me some advice on that?

I got a message from Paypal with the subject "Help PayPal to avoid any kind of fraud" but I'm a bit suspicious: is this a legitimate way that Paypal is trying to get my help to avoid online scams, or is it a scam itself?

I just got an email offering to sell me some "alluvial gold dust" and have no idea what that is. Can you tell me whether it has any value on the market and if so, roughly what it's worth?

I think I'm hallucinating or something: it appears that I'm getting spam events added mysteriously to my Google Calendar schedule. What the heck? How is that happening, and how can I stop it occurring?

My brother recently got a call telling him that he could get his tax refund that's part of the economic stimulus package early - and not have to wait until May or later. He almost gave his savings account number, but then he got suspicious. Now he wonders. Is this a scam?

Yes, it's a scam. Even before Congress passed the $170 billion stimulus package to boost the economy, scammers started calling people to get their bank account and credit card information, so they could steal money, identities, or both.

Some scammers even claimed that you would lose your refund if you didn't give them your personal and financial information immediately.

This is just one of over 1,000 IRS scams that is currently circulating. With the tax season upon us, scammers are now pulling out all the stops to fool their victims.

Here are some of the most popular IRS scams that are currently making the rounds...

I'm wondering if I can create a group within my google contacts and make these group also available to other google users. I realized on your website that you are a google guru - so I thought I give it a try and ask you!

I hate to check my mailbox on MySpace because there are a half-dozen people who seem to have some spamming tool or something and send me dozens of "Request to Approve Comment" messages. What the heck is up with that and how do I block these people?

Saw your note about Yahoo IM "spim" and I too have a couple of jerks who are sending me this junk. Can you tell me how to block them so I don't hear from them again? Thanks!

I got a request to have someone connect with me via Yahoo Messenger, and though I didn't recognize the email address, I said "yes". Next thing I know there's a message from them that's full of sequences like <#43243>. What does it mean?

I can't sit down for dinner without having my phone ring a half-dozen times with stupid junk calls. From carpet to refinancing my mortgage, holiday discounts to drugs, if someone's trying to sell it via telemarketer, they seem to think I'm a good target. How can I stop these calls?

I don't get it, Dave. I get reams of lame, idiotic spam email and occasionally read through them to see what offers are being made, and they're just so incredibly dumb that I can't imagine that ANYone would ever respond. So why do they send 'em?