No need. Last year, on 4th of July, a post on Tumblr encouraged users to attack 4chan with nice stuff. Pissing off 4Chan was the worst mistake Tumblr has ever made, because 4chan spammed feminism, kitten, fandom tags with gore, porn or gory porn. But some say that a 4chan user created the original Tumblr post, knowing that 4chan would hit back twice as hard. Apparently 2 suicides occurred because of the attacks. Heh. Tumblr of course. Just Google "Tumblr 4Chan independence day battle". Tumblr is the popular kid. 4Chan is that one really, really vulgar kid. B.net is that one kid off to the side watching all this shit go down. Reddit is the unlikable kid trying too hard. Myspace is that one guy who used to be cool, because he is the definition of all those past cool things. Twitter is... I have no clue. A bit cooler than B.net? Facebook... Again no clue. Almost as popular as Tumblr? That's my summary of them anyways.