Well, I asked my wife, who is my source for information on non-religious but semi-cultural Jewish upbringings, and she says that she never heard of something specifically called "the 613 Commandments." She was certainly aware that there are, or were, a lot of rules, mostly developed in the Middle Ages and coming out of obscure passages in the Bible. My personal read on these is that nobody today really equates growing the hair long on your temples (which is probably in there somewhere)with murder (one of the Big Ten), and it is doubtful that they ever did. That doesn't mean that rudeness is ok, whether it is one of the 613 or not.