I bet that servers admins can choose to turn off PB and/or VAC. Either way Rcon is the way to go. I plan to get a server, and I'm sick every kid and his mom hacking the fuck up. I'm gonna ban every fucker hacking. Save that shit for Combat Arms.
I can't wait for External Box ESP's if it will use VAC /
But it might be that Treyarch won't fail like IW, i think it's all about finding hacks and sending info to Valve so they make VAC detect it and shiz.
Also it depends how they will implant that VAC.