I don't think a bad review would be the way to go. Shouldn't punish abuse of the system with more abuse of the system. I just reported him. He did it with another map as well.
More kidding than anything. Not trying to start bad review warfare with someone. But reporting doesn't sound like a bad idea.
Don't turn it into a fight guys. Just report and move on. Besides, I have a feeling he's just trying to trigger you. Don't take the bait.