The latest "get a Mac" ad from Apple is pretty amusing. In it, PC is accompanied by a security agent who interrupts everything he says describing what he's saying and asking for permission to proceed. If you've used Vista you get it. UAC is continually popping up asking whether it's OK to proceed on an action I just initiated and it is pretty mindless in its logic.
Of course, one could make a similar complaint about the Mac OS constantly asking for an admin password but the threshold seems to be set to a far less obnoxious level in my experience.
Anyway, it's just a commercial so regardless of you personal conviction don't get too worked up. But it is one of better ones IMO. h/t to Jacqui Cheng at Ars/Infinite Loop.