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 not 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
Also note that comments that contain certain swear words are automatically deleted when flagged.
And If it fits this description:
it is offensive, abusive, or hate speech This question contains content that a reasonable person would deem inappropriate for respectful discourse.
or for comments:
rude or offensive
Flag them.
http://askubuntu.com/help/behavior
Be nice.
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