I prefer to use my downvote to get rid of spammers. After reporting them to HiveWatchers and GuiltyParties, to make them stop posting and abusing the reward pool. They now even learned to hide their plagiarims by changing all the text. But, I have now experience to expose them. Usually they have new accounts and they write very long posts with very long titles. And when they reply to a comment, they don't seems know what they talked about in the post. It's even fun to do if someone is looking to fight abuse.