Amazon has removed a company from their site for threatening to sue a reviewer who posted a review which Leo says could be libelous because his comments can't be proven. Leo says that the company MediaBridge, may have had a case, but Amazon's decision to take MediaBridge's products off the site seems to be a hefty penalty. Leo says posting an opinion is protected and just fine. But to make statements that you can't factually prove open you up to libel. So the moral of the story is, when you write a review, be accurate. You can offer an opinion based on your experience, but saying things you can't prove can get you into trouble.