Hello.
Suppose, there is a hypothetic software product "ExampleProduct" on the market with BAD quality and BAD support. But the company selling it, does not care. "ExampleProduct" is a registered trademark (I hope it is not, actually. This is just a name taken to make an example, if you get me ;))) ).
Is that legal to create www.anti-exampleproduct.com website and place there criticism about this product? If that is not, will www.anti-ep.com website with criticism legal? Or, if not, what legal possibilities of criticism a customer has except "money voting"?
I saw some of such websites around: http://www.paypalsucks.com for example. It does not criticise software product, but it's close to what I mean. I also doubt it's existence is legal.
By legality I mean primarily US or EU law restrictions.