People who annoyingly link their twitter accounts to facebook so people see it twice
"Hes tweetbooking everything, i read it on twitter than have to read it AGAIN on facebook"
Updating every single thing you do throughout the day via Facebook, instead of using Twitter.
"I get so sick of logging on to Facebook, only to read tweetbookings of how Jennifer 'loves her new tampons', or John's rant about the local grocery store 'never stocking Magnum-sized condoms'. These people need Twitter."