Eh. It really wasn't that funny, but I'm not gonna rage about it. It's just another person who misinterprets who bronies really are. They're all ages, races both male and female. Not every single brony is a creepy, fat, hairy old man about to experience a midlife crisis that finds ponies sexually attractive.
One of my closest buddies and childhood friend is a brony, in fact, I introduced him to the fandom. He thinks Rainbow is a cool pony. He likes to listen to pony music. He watches an episode once in a while. As far as I know, he doesn't clop. (He's 13, and he's pretty immature, so I doubt he'd attempt it)
I'm almost certain 13 year old boys and creepy old perverts aren't the same thing.