I have the a somewhat similar deal with mine, my aren't accepting with it ether but i just told them im not stopping my dad went to the point of blocking the tag MLP on the router so i had my group of Brony friends send me my pony stuff,I now purposely put on pony music so they cant hear it and mix it with other music, funny cause they often like the pony music thinking its not pony music XD, I also would never stop because ponies has been the point that changed my life, i never knew i was good at art until i became a brony and started exploring the fandom. I finialy made a power point telling them all about the brony community (not a very good one mind you). But waht i am trying to say is that you should not ever give up and if you can, make your parents see that the community is not all bad, if you have brony friends bring that up cause there is always strength in numbers, Probably my biggest argument was that not only do i have like 9 brony friends at school but i some of my family members are also bronys.