The point of this protest action and the news story is that no action was taken. Even if "a bunch of autists, people with underdeveloped social skills, and emotional growth delays.... are having trouble with social behavior and personal boundaries", their actions need to be looked into, and this wasn't done. If being socially underdeveloped gives a free pass to unquestioned sexual assault, people would live in fear of the socially underdeveloped.
In this case, victims came forward in private to accuse chess grandmasters, and nothing happened. They made public their allegations, and there was a slap on the wrist, and then things went back to the way they were.
By contrast, imagine if someone privately accused some company of making insecure software, and nothing happened. Then they made public the software vulnerability. The company said, "Oh, okay, well it's fixed now. That vulnerability won't be a problem any more." (And also hinted that the fault was the accuser's in making public the vulnerability.) We would be tearing that company to bits in forums like Slashdot. We'd support the accuser even if the accuser didn't have to make sacrifices to his reputation or withdraw from the tech field because of the vulnerability he brought to light.
I'd say alleged victims of sexual assault deserve at least that much, if not more. (Yes, even just "alleged" victims -- they at least deserve a chance to be considered "victims" and not just "alleged victims".)