I posted almost this exact thing on another thread a few days ago. As far as abusing it goes, it wouldn't autoban or anything stupid like that, once the predetermined number of "RMT" reports is hit within the alotted time frame, it would automatically notify a GM, who could then look at the tells this character has been sending, THEN ban if its an RMT. Its really not hard to tell the difference between RMT and a player when you're looking at the tells they've sent.