I think it would be an interesting idea. Diversity takes all sorts of different forms. ABDL can definitely be an identity (I believe specifically is an identity in your case, Tyger) so I don't see a problem with posting it there. A few people might even learn something.
I am not a fan of most of the educational links though, sadly. Understanding infantilism is probably the best, but it spends too much time trying to justify itself, I think. That makes it less than ideal for a lay audience because it sort of automatically puts the reader in the mindset that this might be wrong and they need to be convinced otherwise. The wikipedia article might be your best bet, to be honest, though it's really too clinical and relates to too many other things.
http://en.wikipedia.org/wiki/Paraphilic_infantilism
Edit: Man I can't even recommend the wikipedia one. I don't like all the associations with it. Maybe if you post something, just write your own short explanation. Just one paragraph about wanting to feel like a very little child, including up to wearing diapers. Something like that.