Some guy came in to HxHD talking about a 'credit glitch'. Realising it was a scammer, I decided to play along.
He told me over IM to come to his room, and type my password and username in to the box, but don't press enter (presumably to make me press it with ctrl+m or something), and to wave when I had done it. Once I had type in fake stuff, I reported him.
A nice machine ban was given to the user about 30 seconds later (nice one MODs ). Was pleased with the end result.