Why change the Fallout section? Virtually none of Bethesda's games are intended for kids, so either all the boards should be 17+ or remain 13+.
But the thing is that some of the fans to the series aren't old enough to buy the games themselves, but still have their parents buy them the games. It's not really fair to limit them from the boards but still allow them to play the game (not everyone wants to lie about their age) just so that we can swear on the forums. We can still pretty much get our point across and we have more than enough freedom, just the filters and the moderators keep out any swearing or advlt-oriented links and such.
Well that begs a question of why have an age limit of any kind and why apply it to the forum at all if it doesn't matter?
I don't care, to be frank, I just find the logic odd. If kids can get their parents buy the game, wouldn't they also grant access to the forum, even with advlt content on it?