MySpace.com

Why it smells like ass: It's the most popular website in the world, yet it is clunky and awkward, like something your Aunt Mary would design, if she had the slightest idea what the Internet was; it stops working whenever there is a brownout in L.A.; it makes high school kids think they are important; it gives a false sliver of hope to thousands of crappy bands; it has reduced something as important and lifegiving as friendship into a Pokemon-like collecting fad; it lets people with terrible taste and judgment design their own web pages; it has given the mainstream media yet another easy "the web is changing everything" story to write.
Mitigating factor: Attractive women have been known to post photos of themselves in the nude.