to basically break the stereotype is basically understand why they think like that and try to understand them. i used to be totally against until i met someone dear to me that said he was a brony. at first i was spectical like the usual mare even got annoyed by him talking about ponies all day for 7 months but i was understanding on why he liked it so much like me at the time liking homestuck so much. over time it kinda grew on me and here i am now anyways, basically by understanding there point, giving them honest ansewers, being just a good friend to them in general regardless of them not liking it at all and minimilizing talking about it hopefully each person against will respect you and in return accept you liking it/ view on the community. who knows they might become bronies/pegasisters before you know it with time, patience, respect and loyalty but thats just me. if they dont accept it well, just stay in touch and be friends anyways unless there being mean to you about it then its time to move onto another pasture..