I'm sure this will stop you from jailbreaking your phone right?
Yes, the iPhone will censor your naughty language. But! There are loopholes! It looks like Chris' phone didn't censor him when he used the word "f*cks." The moral: always swear in the plural. And possibly with quotation marks around your swears.
You'll still get censored if you make it onto this site, though. Sorry. Ads, lol.