I'm a big fan of geolocation apps and have been using Foursquare almost since it first arrived on the scene. I like knowing where my friends are and having accidental, synergistic meetings with new friends based on my willingness to share my location information. Facebook, however, is a world where I share my status updates with over 1,300 people and I don't really want all of them to know where I am most of the time. If I did, I'd include it in a status update!

That's why when Facebook introduced Facebook Places, I was a bit leery. Worse, not only do they now have check-ins, but they'll show people who are checked in to your current venue even if you're not friends, and will let other people check you in if they're in the same place.

Disaster. But fixable...

I have a stalker. Some weird guy seems to have nothing better to do in his life than pay attention to when I log in to Google Gmail and then instantly hit me up for a chat. If I don't respond, he keeps sending messages. It's creepy. I don't like him. How can I block him from bugging me?