Ensidia didn't get touched for flower power. The Yogg exploit was reported to GMs (a long with a lengthy explanation on how to replicate it) and everyone involved still got 72hr bans. The only other WoTLK exploit that I recall was normal 25m LK, where Ensidia got banned for saronite bombing the throne down to avoid I think the valks in the last phase. I didn't play during Cata but a lot of guilds got banned in Dragon Soul for abusing something iirc.

But yeah, offtopic.