'"We studied these online gangs at the same time I was looking at the offline gangs and it turned out the model we were developing to explain the behaviour of the online guilds began to coincide with the offline gangs," says Johnson. "We could explain the data using the same mathematical ideas."' Which all makes sense, you know, but it's still interesting to see this stuff being done and taken seriously.

Friendship helps people write community into being in social network sites. Through these imagined egocentric communities, participants are able to express who they are and locate themselves culturally.