The OP question wasn't a question of ethics, it was a question of legality. Often the two don't run as parallel as everyone likes to think. If they did, all of the "rate" sites would long have been removed from the internet, especially "thedirty".
I would hope it is obvious, but in case it isn't, I don't care for bullying of any sort. I have investigated both physical and cyber bullying. I think it's cowardly to hide behind anonymity to slag someone else, and yes I agree charges would be forthcoming. We always trumpet the "we are a reflection of Canadian Society" line. The above mentioned site is our reflection, warts and all.
This site is getting what it wants out of this topic, traffic. Traffic generates ad-revenue, and ad revenue keeps the lights on. The OP question has probably been debated to death.