How on earth could they catch you anyway? It could be a gift to a friend or something. If they banned you for RWT you could argue that you wasn't and if they banned everyone who did I'm sure some of the people didn't RWT.
This is probably the whole reason why there was a limit in the first place, but now that there isn't, there is no way they could detect an intelligent person who just RWT and transferred through like 3 accounts or something, and an average scaper who might of gave his friend a party hat. Hell probably doing all of those account transfers puts up some red flags for Jagex, but in my opinion and what I think is that there is no way they could detect it and if they could, they probably couldn't even catch a quarter of the people doing it.