I have a friend who's been through that as well. He's a bodybuilder and no one believes that he doesn't consume animal products and when he mentions people like Torre Washington,Jon Venus,Billy Simmonds or Jim Morris they just blame it on steroids. Also when you mention that Arnold Schwarzenegger and Mike Tyson went vegan they say they were paid to do so (probably a broccoli industry) or some other silly conspiracy theory. It really is amazing how far people would go just to prove you wrong and how uneducated they really are when it comes to both veganism and vegetarianism.