We're not the police. Just because one person says they're something else when they are not does not give any of the moderators ground to give out infractions and/or ban them. So unless they're posing as someone, let's say the game's GM and trying to get info out of you then yeah, they'll be punished without a second thought (a rather extreme example). But if they're doing so for their own lulz what is there to do? Ban them for having a twisted sense of humour?
All in all, don't let someone over the Internet get to you. What do they gain out of posing and kissing ass? Won't get them too far in real life; just think of yourself as better than such individuals is all I can say.
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