People who run with UAC disabled are only playing Russian Roulette. Just because you disabled it 4 years ago, and have not had any issues does not make that the rule, just makes you lucky. As kids, we all get vaccination against a variety of diseases like rubella and measles and mumps Yada Yada Yada. Most of us will never come in contact with that disease in any form, but there are some who will. And have no clue until you get sick. You might find it 'annoying' that you actually have to click Yes, I want to install, or Yes, I want to open, but that's a might better than having someone drop Trojans unannounced onto your pc. Malware might be annoying, easy enough to get rid of, virus are distructive, easy enough to find, but Trojans are invasive. I personally don't want ppl looking at my bank records when all I did was order a pizza online. Adobe, Java and some few others are nice enough to at least give you a checkbox when installing, you are allowed not to install the f'n Google toolbar, but many others are not so nice.
I don't see anybody complaining when mail is automatically routed to junk/spam boxes, even if it's something important, so why complain if there's other aspects of windows that are trying to do a similar job.
If you want to disable UAC, fine, do so, your gun and your bullets. But advising that ppl 'should' is tantamount to mass pc murder.
Apart from the fact there's plenty of software out there that does not work right without the UAC permissions.