It was the first thing to be turned off when I installed windows, it is to far annoying for the benefits it produces. I wish permissions where as easy to turn off so you "own" everything in every folder.
Precisely how is it annoying? Sure, when you initially build the system you go through a few permission dialogues, but in day to day use, really how many times does it come up? And even when it does, how is one more click annoying? Surely one extra click for a little bit more security is better than no security at all?
I'll admit, I trust myself more than any of my security, but that doesn't mean I go without it.