Like many physicists, I too receive messages saying that "truth does not exist". Since this statement also applies to the person making it, I understand that the person - usually a man - does not want to be taken seriously.
Then there are the people who uses lies to discredit others. Sentences such as "strings do not make experimental predictions, but are the only possibility for a theory of everything" or "there is no alternative to supersymmetry" or "the spaghetti model claims that particles are knots and thus cannot be correct" show that many people have a distant relation to truth and honesty.
Remember what Huxley did for evolution? 150 years ago, facts were on the side of evolution, lies on the other side. And Darwin's bulldog rubbed it all under their noses. The creationists and the string people are indeed similar. All facts so far prove that creation is wrong and that creationism is nonsense. Facts show: evolution is correct. And all facts so far prove that supersymmetry is wrong, that strings are nonsense. Facts show: the spaghetti/strand model is correct.