Dude, as someone who gets paid for doing what is essentially outcall tech support (you call for support, I come to you) all day, every day:
CHRIST YES.
I'd take getting laid off if it meant that there'd be fewer idiots running 0wned Linux boxen because they didn't bother to A) update and B) shut off all the extra services. Same goes for 0wned Windows boxen. It would also cut down on the number of Mac users calling up tech support and getting confused when the tech asks them what version of software they're using:
User: I'm using X!
Tech: which X?
User: What do you mean which X?
Tech: They have versions, like 10.1, 10.2, etc.
User: Oh you mean the CAT like Tiger, Jaguar, Panther, Puma!
Tech: *facepalm*