Online Revenge

Revenge Posts

I've come across a couple of sites devoted to exacting revenge on someone who has victimized the author in some way.

How NOT to steal a Sidekick
The Broken Laptop I Sold On Ebay

In the second case, at least, the police (in Briton) are investigating the victim (of the laptop fraud) for hate speech.

I'm sure there are many other posts like this, but I think it's an interesting (albeit with high potential of backfire) way to air your grievances. Wheras it might be smarter to go to the police and try to get your money back, these two cases seem to be more about embarrassing the other party.

I wonder how much of this counts as libel.