Well if everybody judged (vote for your top three & can't vote for your own via the same topic that you submitted your entries, for example) then having multiple entries might work against you.

If voting method is used, we might originally present the limericks without author names. People might like to try figuring out who the authors might be.

Blind reviews! I love it!

I like your idea, Myth. Or...everyone could send their limericks to me, since I am not playing, and I could send them all in a bunch to the judge, without any author names attached. That's not bad!