Blizzard has announced that they've banned over 5400 accounts and suspended 10700 others for gold farming, hacking, cheating, and other antisocial and unapproved behavior. In their announcement they specifically thank the informants who made it all possible:
Many account closures come as the direct result of tips reported to our GMs in game or emailed to hacks@blizzard.com by legitimate World of Warcraft players. If you suspect that a World of Warcraft player is using an illegal third-party program to farm gold or items, or is otherwise violating our Terms of Use, please report the suspected infraction via one of the means listed above. All reports will be investigated, and those that prove false will not result in corrective action.
The ensuing discussion on their forums is particularly amusing and underscores a long-standing truism: when it comes to MMORPGs, as far as some people are concerned there's no such thing as good news.
World of Warcraft Accounts Closed [World of Warcraft]






















