Ignoring people isn't something I can do. There is no "polite mode" with my lack of executive function. If someone is a jerk, I tell the person, at that moment. That's something non-autistics never quite grasp, either. My wife has known me for 30 years and forgets that I have no mental editor. Unfortunately, I also relive moments, visually and aurally, for years after the incident. It is a mental film loop, playing repeatedly every day of my life. It is unpleasant, especially since one bad moment with a person or group is the moment that sticks with me for decades. If someone is rude, insulting, or cruel, that person has become a life-long miserable memory that can be triggered by the slightest thing. So, the best option is to avoid potential jerks.
At birth, doctors suggested I would be mentally disabled, in addition to the physical injuries I suffered. I have never been described as normal. “High-functioning autism” (HFA) is just another way to describe a few aspects of “me.” The autistic me is the creative me, the curious me, the complete me.