On Transterrestrial Musings, we had a policy where people could post comments first and be bumped later if we determined them to be robots. On Decisive Win, I am holding the first comment of each commenter for moderation. Then if I determine you are not a robot, I will give blanket approval for all subsequent posts. You can call it prior restraint, discrimination against Cylons, and suboptimal. But it has kept us free of blog spam. I want to charge people $0.01 by credit card to prove they are not robots and raise the toll as needed to keep out spammers. Look for that coming in the too distant future.