Originally Posted by
Endus
As usual, Blizzard does not communicate to the community and does not take immediate action for a very good reason.
It helps them catch hackers more effectively.
The moment a ban wave starts, hackers know they've been caught and change their program to try and make it undetected again. If you're banning them immediately, you enter into an arms race with the hackers. Blizzard has decided (probably correctly) that it's easier to let the hacks flood the market, get everyone who's going to cheat using them WHILE you can identify their accounts, and then do a massive banwave and catch them all at once.
The same reason is why they don't communicate. Any communication informs the hackers as much as it informs legitimate players. The goal is to keep the hackers in the dark so they don't know they've been caught, or how, as much as possible.