I have seen plenty of people on FR using foul language.
THAT is your claim, guess we could argue how many is plenty. I stand by my claim and I've been on FR a lot since 2004, I have never seen the 'F' word, the 'S' word, or 'GD' used on FR. By contrast I have seen them used liberally over on DU. On the whole outright profanity is not tolerated on FR, like I said on occasion, some other words that you might consider profanity may slip through, but that really is the exception, not the rule. This however is not a Christian site, it is a conservative site.