"but there are some who just want to feel special."

That describes most of the situations online unfortunately, because it is too easy to lie. It's rare for people to assign self-diagnoses accurately in general, and many of the 'self-diagnosed' people I see on the internet pander to the worst of stereotypes and assumptions about the supposed illnesses they have. DID is apparently all the rave to fake, for instance, and so are wild and offensive inaccuracies about it.