Yeah I feel like the whole fraud defense isn't really much of one. Steam, Origin and other services have to deal with this sort of criminal activity on a daily basis. Blizzard themselves had to deal with it in WoW pretty much from the start.
Besides, it's not even so much this single announcement as it is a series of very poor decisions that keep screwing the players/customers instead of the people directly responsible. There are dozens of unbanned third party programs that are constantly being used to allow things like gold botting and so on to proceed - get banning already.