For them, apparently an excuse

I think 4chan is adamant in using definitions the wrong way.

You know

'trolling'

Unfortunately, it seems to be thrown around by people who are trying to avoid blame for bad behavior. A lot of IP2 streamers yell that they are autistic to persuade people not to call the police. This stuff eventually filters through the internet to the point that people are using the word autistic in association with bad behaviors that have nothing to do with actual autism.

Some do -- most don't.

No

I don't think so, especially people who treat it like a badge of honor or superpower.