if someone has a problem ,and they have contacted the people concerned ,and they have had no satisfactory result , and they are 100% in the right and they want to warn others ( which has happened eg . alerting people to scammers etc ) then I cannot see a problem ,and neither would a court of law .problem being some people haven't got it 100% and are commenting on hearsay ,that is where the problems can begin. some threads /posts are sabotaged by people who have never met ,or bought anything from the persons concerned ,and yet still post negative comments, once this starts people get wound up ,