http://mashable.com/2010/05/10/twitter-follow-bug/
lulzTwitter has an embarrassing bug on its hands – one that allows users to make anyone follow them. Mashable reader Ozan Yılmaz emailed us the details this morning, writing “[tweet] accept [username]” then the [username] immediately starts following you.”
We confirmed the issue when we noticed that our main Twitter account is now following lots of new people that we didn’t manually follow on our own. That means that if you choose to exploit this bug, your tweets can show up in anyone’s timeline — at least until the issue gets resolved.