VERY common here.I think he's just trying to help you out and make sure no one rams your car. Think coal rolling, etc. (largely an extremely rare occurrence but it certainly does happen). CW permit may be a reference to a CCW concealed carry weapons permit though I'm not sure. In San Jose your magnetic stickers may be generally well tolerated though. I certainly wouldn't worry about having the stickers too much in the West Coast urban areas; I think they'll generally be regarded with tolerance, though I also wouldn't put the sticker on; I don't plan to have the vehicle perform any behaviors on FSD Beta that anyone outside the vehicle would notice - just going to be like any normal Tesla, driving fairly aggressively. If it's not behaving exactly how I would, I will disengage (or at least provide enough steering input that it probably will).
I get coal rolled and EV hate here in small town Utah constantly. To the point that having FSD beta piss off other drivers just isn't an option.
I'll definitely be getting some sort of sticker to inform others that AI learning is in progress. And I'll just keep putting up with the coal rolling and EV hate as it comes. My wife says I have a talent for defusing tense moments, so let's just hope she's right. I have been able to get a few guys that have road raged me laughing in the past, so we'll see.
The only thing better than not suffering fools is to get the fool laughing.