Say 'fuck' or don't say 'fuck'. Don't mask 'fuck', it's the worst of both worlds. People who like swearing will be annoyed, and people who don't like swearing will be annoyed. It can also make you look like you're timid and want to be edgy.

If you're in control of the text, you should never be in a situation where you're self-censoring - all you're doing is moving the origin of the censored word from the page to the person's head.