The ones you mentioned are okay if you're using them decently. I can see why TicketStumbler would benefit from Twitter, absolutely. And Facebook and blogs are different: blogs help you reach out to your current users, and Facebook Pages are built to let you attract fans. I guess that's not the misusage I was thinking about: I referred more to the spammers and the people who sign up for every service imaginable just to attract people. (The owner of AllFacebook, which I used to write for, did that a lot on Twitter, and it always just seemed slightly wannabe to me.)