[@mahz] while a revision history can be very useful at times, its not mandatory. If anything, it'll be enough with one that keeps a record of what the post was say, 24-48 hours earlier, which mods can restore on request should a GM/Co-GM go crazy and try to delete everything.

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Definitely agree on the GM deletion function. Its very open for abuse by GMs that get into conflicts with players. Its better to have all forms of Delete/hide previously written posts to be in the hands of the moderators. (or do some of them have tentacles instead of hands?).