A portion of the fandom is sexually interested in zoophilia, or in fursuiting, although a majority take a negative stance towards the former.
good to know that a majority have a negative stance against sheep love! not that there's anything wrong with it, and some of their best friends do it, but they just wouldn't choose it for themselves, no judgment!
And a "portion" of the Brony fandom is goes about on four legs in "pony fursuits" at brony cons. Most don't, and think those that do are weird.
And a portion of Anime fans cross dress in $3000 costumes of little girls (and have sex in them, too!). Most don't, and think those that do are weird.
And don't get me start about Doctor Who fans, what with all that slash fic about the Doctor making sweet love to... himself. And the Tardis. And himself again. At the same time! Most don't, and think those that do are weird.
Every sufficiently large enough group of people has it's perverts. Furry / Brony is no different than fans of Japanese Cartoons, szPopularScifiSeries, or Random Popular Book of the week. (For example, 50 Shades of Grey proves that all Twilight fans are secretly into BDSM!)
What IS different is that a particular website designed to harass people a few years back decided to pick and choose the most vile crap they could out of the Furry Fandom, presented it as representative of the whole, and a very large group of very ignorant and unimaginative bandwagon hoppers took the meme and ran with it. For a decade.
Ironically, the same mindset that causes the "LOL FURFAGS, 9 FOOT LONG COX AND HIPPO BALLZ LOLOL" crap is also the proverbial cancer that is killing /b/, so... karma's a bitch, eh?