It isn't a question of whether something is kid-friendly. It's a question of what sort of environment we want to keep here. Show me another site that allows swearing that is not infested with spam and personal attacks and I will be very surprised. There are a few cases, but those require excessive administration or really odd administrative structures.

The JCF has a pretty good environment, I'd say. People are free to say what they want, as long as it does not detract from the environment. I have never seen a valid opinion that cannot be expressed without breaking the forum rules.