Quote (dankly @ 11 Mar 2016 01:55)
any computer on a home network shows the same IP so if you have 4 computers on the same network with 4 CD keys, it looks the same as 1 computer with 4 keys.
I heard that there are "ways" (sry im computer illiterate) for blizzard to tell the difference between 2 machines and s***b*xie instances x2, but that its a really complicated and resourcetaking task, so that theres like zero chance that they will try or care for doing it, even if they would prefer banning s***b*xie-users, which Im not totally sure about anyway.