It starts already on the homepage. If you're a complete newbie in the computer world and you're suddenly confronted with computers because e.g. your child gets one from school, a site like AO would be extremely complex for those people. Simple things like conference rooms, avatars, forums, bookmarks, buddy lists, antipoints, profiles and even the log in/log out options. If you're experienced with computers and a bit smart, it's easy to just discover what those things are. If you're a complete newbie with the average IQ of 100, those things can be pretty complex...

There are still quite a lot of people out there who know absolutely nothing about computers and who don't really want to know more about them either. But for whatever reason sooner or later they might have to work with those "horrible things". That's not easy, if you're new to it.
Anyone can browse around this site based on... reading ability?

Hmmm... Let's put it this way then. I've spent half my live doing all kinds of things with computers. If that doesn't qualify me a little bit as experts in computers (general) then I've probably.
And yet you target the illiterate to make it appear that you're some how better or in your own words above average. Good job, Katja.