So, I'll come right out and say it. I may have been taken in by a troll. I don't think it's as simple as that, but I have nothing to base this on but my own gut instinct and the general tendency of all fandoms to circle the wagons where issues of gender, race, or basically not being a jackass are involved.
But I have to admit here that, as a commenter pointed out, I have my own confirmation bias to account for as well. I have on occasion been treated like crap by people flying the "brony" flag myself; I have also facepalmed at complaints about humanized Twilight being depicted as black, been creeped out by horribly fetishized pony art that I stumbled on while looking for references, and groaned at self-appointed (and apparently unchallenged) spokespeople for the fandom shamelessly egging on Lauren Faust/John De Lancie/Tara Strong to "Tell us MORE about how awesome bronies are!"
So yeah, it was very easy for me to believe the OP. If she is a troll just expertly pushing my buttons, then shame on her for pushing them and shame on me for allowing them to be pushed. But the fact remains that those buttons are there, and they didn't come from nothing.
Anyway. I didn't want to just leave all this hanging there. Michelle Creber has said that she was treated nothing but wonderfully at the con and I believe her. The rest is all hearsay.