Fair point. I suppose it was that if everyone posted subtle variations on a theme it's a way to vote mine. Or simply copy someone else's answer, write in an "Edit: ninja'd" and hope for accidental votes.

Having said that, looking at the HTML is a much more general solution and probably does deserve an up-vote. But the principle was to only give a vote to the first person to answer, because after that help is technically unsolicited (since they can see it's already been given).