I have given the look to people/young people that use bad language in front of my son. And, I have had others nudge their friend when the friend uses crude language in front of my son, and I always smile and say thank you to them for noticing.

As for baseball caps, I don't want J to grow up with a cap on his head, and will discourage him from wearing it at meals. Probably not indoors, but, at meals.

As for treating everyone the way I want to be treated, well, that only goes so far with me. Frankly, if someone repeatedly treats me poorly (which I can't say I really have had happen), I would probably give up. More often, I take the extra time/energy to get in good with them, and can get them to turn it around. Some people are just sour!