I was in Great Hall, casting Colovaria Duo on the carpet to get my tier up, and Help Barker used /tpa on me, so I told him to not do that in house chat (Because he's Ravenclaw) and then denied it. But then he did it again, this time only spamming my chat COMPLETELY. I decided to report it because of abusing a bug, and even if he did not know, I told him to not do it so he should know not to.
Snapshot: http://imgur.com/XGVBwq7