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[Omanes Alexandrapolites]

Mafia games could be using this function... you know.

I personally would consider it a little bit intrusive. Although it could be used to find vote editors and rule breakers, it would make the games too easy. Should a Mafioso, for example, realise he's posted something suspicious and then rapidly edit it out, users will be able to backtrack and see the edit henceforth finding him out.