In a new comic, cartoonist Patrick Moberg compares various web 2.0 social networking tools to intoxicating drugs, including tumblr, twitter, vimeo, and myspace. But don't think that he holds these utilities in low regard. Moberg once used them and more to locate a girl that he saw on a NYC subway.
Link via Urlesque | Image: Patrick Moberg
Other than that, it makes a couple of good points, but I'd like to add one.
4chan is powdered cocaine: the first time you use it, you either hate it, or you're hooked until you've realized its ruined your life. You will withdraw from family and friends who do not also use 4chan. Has the added effect of dulling all emotional responses except for anger. Known to cause lasting brain damage.