As Buff says, that is game exploits and have nothing to do with PB.
And no, you have to be logged in through RCon to kick/ ban someone from a server, if not that would cause pretty much havoc ;)
ATM EB have not an updated list of available PB commands (CoDWaW)
But you can most likely use the one for CoD4, have not yet checked that though, but I see no reason it should not work: