Not necessarily. The guy in the SEI suit really did post crap (mostly that he made up), although SEI's reaction was extravagant. Andrew's FireClean article and the testing he had performed were both questionable. The testing was not very accurate. He should've just looked at their patent. All the info on formulations they tried is in there. He was largely correct about vegetable oil though, so it was dismissed because FireClean could not show that everything he stated was untrue, or that he had any intent to harm them.
So the details do matter.
Defense is relatively inexpensive if you've done nothing wrong. You can defend yourself.
You won't have to, if you don't lie or fabricate things to enhance your BS story.
The plaintiff has to prove your statements are untrue.
Like I said, when it comes to Todd and friends, there are plenty of true stories.