I don't think there's people walking around in t-shirts that say 'neurodiverse'.

However, I've definitely had interactions with co-workers or classmates that think they are the most special and the most smart, to the detriment of their ability to work with a team. Not sure if that's 'neurodiverse' or just bad manners.

In certain online forums there's also a tendency to laud highly intellectual but somewhat antisocial behaviours, and to talk down about 'neurotypicals'.