Unless the GM can check the same IP that could be problematic of course. Like me that use numbers but that number 054 is my insignia or signature.To be honest i have same id with numbered at the end, it make me easier to remember all of my id., and i raised all of character of each id for lvling and different job from another id. Why you can say that like cheating in game ? Maybe u can say that cheating in game for lvl 1 character of each id. U must thinking of it. Im sure, not only me that people have more than one id with numbered at the end of id.