For questions where rudeness is pertinent to any party of an encounter, whether that is the person asking or a third party. Include other tags for cultural context! For questions regarding how to be polite, use the "politeness" tag.
There are some people in life that can come across as rude, or can overtly try to be rude to the people around them. Often in these situations it can be difficult to interact with them, reason with them, or just in general be with them. In addition some people can come across as rude without even meaning to when trying to achieve a certain goal or reply to a certain comment in a certain way. Questions here are about how to deal with rude people, but also situations where people come across as rude, and even situations where you may appear to be rude, even when that was not the intention.