It's not libel if you're stating facts. If Person A rips you off and you go online to bash them, it's not libel. He said he was going to do X and didn't deliver, but kept your money. Now if you say Person A fucks underage boys and beats his wife...now that's libel. And most libel suits lose because it's hard to distinguish between opinion and fact. You can avoid any libel suit by simply saying, "
In my opinion Person A is a..." -- and they can't sue since it's your opinion, and you're entitled to it. Freedom of speech, bitches!
I was taken to court years ago because of a website I put up that was the name of the company + sucks.com. It was theircompanysucks.com - and I optimized it so it showed up in every search result for their company's services. I called the owner a piece of shit, a liar, etc. He sued for libel and lost because I established proof that he ripped me off, and I also wrote a small disclaimer that no one until the court case probably read, that said everything on the site was my opinion. It did cost me a pretty steep fee in legal bills that I'll never be able to recoup, unless I counter-sue, and that is just another headache waiting to happen.
I hope this helps. Crooks shouldn't be able to hide behind the legal system.
