He said he uninstalled BL hack, and has multiple accounts and ID's. This will take more intervention than banning his main account. And i agree, he should be punished, but untill proven guilty for many of these things, he shouldn't be followed around on BL while hes trying to be a normal player.
You don't install it, you inject it is pretty easy to do. Even if you delete the files still simple to redo them all again.
