so that means if someone or a company ripps you off (not the party or parties mentioned in the link) for argument sake you buy some thing off ebay or a web page, and they never send it or send you a different item to the one you have payed for, and after exhausting all avenues trying to sort the problem out, you tell the truth on a forum saying that you have been ripped off by that person they now can sue you? its a bit wrong in my eyes.

No, the rules of defamation remain - truth will generally be a defense. The article doesn't mention what was said, but from the sounds of it the comments were derogatory and without defense.