I'm not a brony/pegasister, but I do love MLP. I'm also on a forum for them too, and I've learned to accept them. You do get a lot of the more extreme fans who think the ponies as their wives. However, I'm not the type of person who judges anyone for what they are into. People are ignorant and stupid for giving this guy a hard time. I felt really bad when I heard this story because... brony or not, no one deserve to be bullied. I've been down that road many times, both online and offline. I know what he went through.
As for him having AS, it wouldn't surprise me. I've discovered a lot of autistic bronies on the forums I go on for it. Most of them have Asperger Syndrome. In fact, a friend I met on there has Severe AS and other issues. He has had a lot of trouble on the forums as well. I don't talk to him as much as I used to though. People will bully anyone for anything nowadays just to get a kick out of it. -_-
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Currently diagnosed with Autistic Disorder, ADHD, severe anxiety, learning delays and developmental delays.