Guh, but the problem comes on people that is on a LAN and people get the same IP and ID, because of the router or server. Know what sucks then? IP BAN XD.
*One does something wrong, sharing account, ban, 13 people"* WTF WHY WAS I BANNED?!
Happened here once, 7 of my friends, on the LAN I am sitting on, one was IP banned, still no idea why, and the rest of us with him
.