@neologist,
This is me but I wouldn't have any young (under age 14) relative of mine be online without over-the-shoulder supervision.
BTW, A2K has always had a varying degree of swearing...perhaps 6-7 yrs ago there was a different level of moderation. For the most part, those that use profanity are no more or less intelligent. Some folks are more likely to use it for emphasis and/or reflect the 'street' than others.