"If, for some reason, Blizzard breaks their pattern and starts handing out actual severe punishments, then I'm going to be happy as hell. It gives a chance that such exploiting won't be tolerated in the future. It'll also make guilds seriously consider before doing something stupid like what happened with LFR. Right now you're better off trying to cheat if the primary goal is to win the PvE race."
http://www.mmo-champion.com/threads/1034351-LFR-Exploit-Discussion/page64 (post 1270)
This is what has been allowed to develop over the years.