That is the $100 question. I grew up with sarcasm, and usually, it is very, very funny in my experience. However, the actual meaning of the word and how people use it tend to differ. The origin of the word has hostility and meanness as central themes. I don't use sarcasm that way - I use it to poke fun at myself or a situation or make some absurd remark everyone knows is not true. I think the words "everyone knows is not true" are key because demographically, humor can be quite different and in conflict with the area's understanding of positive interactions. For example, I am from New England but moved south several years ago. I quickly found out that people didn't understand my humor and were offended by it. And this was when I was joking about my actions. It took me a while and much research later to figure out what had happened. I think you have to acquire a finesse about sarcasm, which usually comes from living with it for a lifetime. There is an art to using sarcasm at the right time and with the right people about the right things that can only come from experience. Everyone I knew growing up would be quick to give you a dose of your own medicine if they thought your sarcasm was a little too biting. If sarcasm is your go-to for jokes, keeping the sarcastic signs small enough so people can't read them from the sidewalk is best. Once guests are on your porch, you have a choice to comment on the sign. I do still laugh for days about a sarcastic saying, however.