What we thought of doing was your submit someone you wouldn't want to tweet and then have an account (the punisher account) tweet them the message saying it was written by you.
When we were at university we had it running on the machines there and it would just wipe your home directory or email your professor - harsh times but good times.
I've been sacked from a small telco too. They told me I was no longer profitable for them. It was worded in such a way that it went to my junk email folder and I lost that phone number completely (too late to port it to a new carrier)