The fact remains, that vegetarians, and even more so vegans are still minority in the society. People that eat meat - the majority, don't always understand us, and as it has been with many minorities in history - our existence and reasons are somewhat weird, odd, silly and what not - to them. Some people are so insecure that they will seriously go out of their way to be simply mean. Some, don't understand, that we pay a lot more attention that our diet is full in all the elements human body requires, and amazingly enough for them - not all of the necessary elements are in meat.
Also, a thing that happened to me, was this. I was talking with my mom once, of how much better I feel while being a vegetarian. And then she said to that "I have heard about this girl, who was in a hospital with anorexia... she was so thin and she was still thinking she's fat". I was like..."what that has to do with vegetarianism?"
My mom replied "somehow, when I think of one, the other comes to my mind".
I've always had fast metabolism, and I never had weight problems, before and after I became a vegetarian. Being healthy is very important to me, and it is not like I changed all that much past 6 months, yet my mom felt like having a conversation with me about anorectic girls. In the end it was kind of funny, as I explained to her that I probably know more about well being, and healthy food habits, than any meat-eater around