Oh, I see what you're saying... You're worried that some dinner party guest might log onto your computer and fill your root partition with insecure daemons? Not a problem -- how many Linux users host dinner parties? Maybe if we were using Windows 7 this would be an issue: http://www.youtube.com/watch?v=1cX4t5-YpHQ (it's real, sorry, only watch if you have a strong constitution)
For the record I agree: it seems utterly daft to have this enabled by default. Did we forget the lesson from RH6 having a bunch of unnecessary daemons (read: breakin vectors) enabled by default?