Furries are fine. Bronies are fine. Just so long as they don't go off the deep end, but that goes for pretty much any hobby or interest.
The worst, however, is their hybrid abominations, the cloppers.
Through all personal expierences, id say bronies, but I tolerate most of them because lots just smoke pot and watch the show, I'm a furry and personally just like the art and how awesome it is to meet some super nice people, go to a con and just introduce yourself, were really chill and respectful, we even have dance competitions!!!
To set something straight, there are two types of Bronies.
Brony: a male of any age who enjoys MLP.
Clopper: Engrapadora.
There was a massive split between the two when the Bronies finally said "get off our sites you sick -blam!-s". Now they stick to sites the majority of us don't venture to. And we're left with more safe for work stuff to read/listen to.