Confession is good for the soul

If you and your friends decided to pull a bank heist, make sure you don't have a friend stupid enough to call a radio station a month later and brag about it. Click here for story. The police had no leads in the case until one of the robbers called a radio station and shot his mouth off.

This is the main reason you should not confide in others when you break the law. Break the law by yourself, then you won't have to worry that your dumb friend will open his mouth at the wrong time.