I wish Twitter were like Craig's List, where you could flag people who are abusing it. I wish it were like Blogger, where you can block comments.
I find Twitter to be a bit strange. Suddenly people you don't know are "following you." Facebook is better because at least your friends follow you, or if you're famous, it's your fans.
People told me that Twitter would build my business. I wonder. I'm going to try to use it strategically and see what happens.