I don't know. I can sort of understand that in this situation the autistic person's stress levels may be so sky-high that comprehension of such things may be delayed. However, in that situation our natural reflex is to *get out of there*, not to jump on women like some sort of slobbering caveman... so, no, I don't think the autistic argument works very well either.
I have seen autistic men behaving terribly inappropriately towards women: generally severely autistic rather than mildly, but not always. It does not look *remotely* like an unwanted grope from a neurotypical man, and people that severely autistic are impaired enough that they're not going to want to go anywhere near a conference. I'm not anywhere near that severe but I stay away because the things are just too crowded, thus stressful.