I'm on twitter and report abusive tweets when I see them. There's one middle aged nasty tra (that likes to dress up as a 'housewife and appears to spend all their time playing computer games) and I've lost count of how many times twitter have reported back that they found them to be abusive. They did get a 1 week ban once but mostly it's a 12 or 24 hr ban. How many bans before it's supposed to be permanent?