For those of you who have had past experience with Battle.net, these numbers probably don't surprise you. The network has had a long reputation of being fairly easy on people using hacks as Blizzard tends to save up over a long period of time in order to do a massive batch of bans at once. This means that those who are using hacks have a long period of time to abuse the system before anything is done about it. The hacks for some games were rampant enough that other players began using hacks that detect other hacks. Regardless of the reason behind using a hack, it is still against the terms of service and means if you get caught, you're out.