Yeah I know it. Well you have some options, first one is to get big real fast, so everyone knows you mean business.
Second, get a thick skin. But try to explain it to people, it's normal to think these stuff of you. We are the ones with the 'abnormal' live style. But just explains how it works, don't go sit down in a corner and eat your food. So instead of ignoring them, educate them. Gain their respect, once again, show them that you mean business. It's my first year to, and at first it was really bad, but now I'm actully working on a dieet for the hottest chick of my year. (Not she's not fat, but she
ice skates, pretty high level, she got some quads I'm jealos off lol, and glutes..god damnn...but I explained the whole protein for muscles and complex carbs are good things to her and se said ok, make me a dieet)