Abstain from downvoting? I've in fact adopted the tactic of agressive downvoting.
Spurious logic? Downvote. Personal attack? Downvote. Comment scored higher than I feel it should? Downvote. Metadiscussion? Downvote.
I lurk on the new comments page and ruthlessly wield my downvoting power like a foul-tempered monarch. If you're one of those people whining, "Why was I downvoted?" -- well it was probably me. And I'll downvote your whining too, and anyone who replies to your whining, and anyone who whines about whining, and I'll downvote your family and kids too.
Note that if you downvote too much, the votes aren't counted, so you have to upvote once in a while too.
I flagged this Poll too. Take that, Internet.