Uses a variety of different names - Mark Railton, Cheech Wizzard/Wizzord, Angela Sommers...
Cheech is a page hi-jacker, posts images designed to upset on public pages, admins troll attack pages and claims to be a hacker, although there is little evidence of this.
Uses a variety of different profile images - look out for these...
Here's an image of Cheech bragging about conning a child into giving him the password to his Facebook account.
How does this work? The troll (in this case Cheech), suggests that Facebook will automatically obscure anyone's password if it is entered as a comment. Quite often, other trolls who are in on the trick will post a sequence of stars to apparently show their password being hidden. But it is a scam. If you do this, the trolls will have your user name and password, and that's all they need to take over your account.
Here's an image of Cheech making a threat in a troll group.