It could be deleted for even something as simple as a sig wipe and not someone trying to cheat. (I seem to remember that happening in some contest the Icon was in. The sig about Link and Fairy and something like that)

This is mainly what I was talking about. The first contest I was in I deleted one of my posts because a friend over AIM noticed that my new sig had a censor bypass in it. I explained in my next post why I deleted it and got a "just don't do it again" response because the match had yet to start, but I can imagine the dilemma if I hadn't noticed.
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Huh? Finger!? What the hell? -Cloud
I'll STAB him in the forehead with my FINGERNAIL! DIVINE RETRIBUTION! -Egbert