The lines are blurred when you get on the internet. For instance this forum might feel like talking down the pub. But, in fact, it's indexed by google and is visible to hundreds of millions.
Here's the real problem. The difference between libel, slander and having an opinion is not quite that obvious. For instance I could, probably, get away with naming a professional by name and stating that "from what I have read and researched, I, personally, would not want to go to them.
However if I was to research that professional and state "don't go to him he's a butcher who does bad work", without fully substantiating my position, I would be wide open to libel. I might even be in the first case, however as it was only my opinion in a case where I was making a decision, it would be significantly harder to prove libel.
If you re confused with that statement, simple rule. Never, ever, mention a professional by name with a value judgement. Unless he's a footballer...
