Also be aware that, depending on the "profanity" used, people might seem like they don't care because it's not actually against the rules to use.
Case in point: a certain "d" word. I use that as an example because I've seen it reported several times, but it's been off our censors for a while and isn't against the rules to use (unless a post is flooded with it). Of course, if someone keeps using it against another person when they specifically know that person doesn't like it, that's another matter and is more along the lines of harrassment...but just using it or another similar word of a rather tame caliber, at least in moderation, isn't breaking any rules.