Nope, but it is harder to enforce than real swears.
It still means the same thing, and is recognized as the same so ♥'s or ★'s are going to make it any better.
http://meta.stackexchange.com/a/22233
Profiles, are a entirely different matter: http://meta.stackoverflow.com/questions/251442/how-to-deal-with-user-who-use-abusive-words-in-about-me-section