Twitter,... well, I probably will never understand it's use (I don't use it .)
So no, didn't get this... but why did this make your heart skip a beat?
There's the wikipedia article, then there have been half a dozen talk shows, etc?
Well in a nutshell, Twitter is a social networking (SN) platform where people 'tweet' their thoughts in 160 characters. Certain individuals take further steps to reach out to the masses in a bid to entertain/inform.
It's like a comic strip in a newspaper. If anyone could be journalists and write articles for a newspaper, then there is one artist who uses the newspaper to showcase his comics in the form of a comic strip. Likewise, several individuals use SN sites such as Twitter to showcase, to entertain/educate in their own unique way.
Anyway, like what FauxPas said, it is just unexpexted (or extremely rare) that ABDL stuff appear in the mainstream walks of life, so I had that mini heartattack moment.
I think the less you pay attention to things like that, the more you see them. I see abdl stuff everywhere, its no secret that such a thing exists, and the public has become decently aware (albeit misinformed) about ABDL's and Infantilism through many mediums. Everytime i see it mentioned in the mainstream media, its just become a "oh, this again" type of reaction for me.