Again, as discussed in the previously opened topic - the method you choose to bind the interface to the particular player or PC is irrelevant. It is the information of that player or PC that you need before you can do anything else. (IP, Nickname, HWID, Geolocation, PID, Timezone... doesn't matter what you pick for as long as you have access to that info of the particular individual)
PS: If you are looking for a case specific method in an open forum thread where everyone can see it, then it's not much of a protection anyway