Is that why DOF screenshots can no longer focus on players?
probably yes. cause if the client raycast could hit them/client can get their position, it would be a trivial task to make an aim assist function.
badspot cracks down hard on any known method and source for cheating like spoofing packet data (for speedhacks, for example) or wallhack/aimbot. one thing he does pretty reliably, and usually results in an update to fix the exploit.
i guess it also means if you manage to find an exploit like that you can essentially guarantee blockland an update