What sort of people get made fun of or treated with disdain socially?

I get most of you are normal and usually are the ones perpetrating these things but what makes someone subject to insults, bullying, laughter and social ostracizing? Can these people do anything to alleviate the torment or will it always be this way? Note : I was never bullied in HS or prior, occasionally teased but I went through life without issue it wasn't until age 19/20 when in the real world did I begin to receive this onslaught of hatred and rejection. I was seen as weird by girls growing up and I dont know why.

What sort of people get made fun of or treated with disdain socially?
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