A lot of things seem to fall into the category of "emo" for some reason. I have not been called emo since my freshman year of college when I was wearing a Bright Eyes shirt and my friend Eric said, "Hey, emo kid, are you feeling okay or is that shirt bringing you down?"
But, in a similar way, I have been asked several times if I was a vegetarian. More than several times. And, not in a kind way. More like, "Oh, well, Danielle, what appetizer should we get -- oh, well, I guess there aren't many options since you're a vegetarian." Which I'm not. I wasn't sure what it was in any of the situations (at both of my jobs, out with friends), but when I asked a girl I worked with, she said, "It's that hippie-ness about you. You know." But no, I didn't. I'm not actually a vegetarian (though I hang with a vegan crowd and think nothing wrong with it) and I am not a hippie. At all, really.
So, just, I don't know. It's a strange thing, but a lot of people have very general ideas about "emo" and a lot of people fall right in to those categories.