Exactly. I for one, and probably many others on this site, hate social networking. I really believe it dumbs down human interaction and that the South Park episode on it really summed up the issue. However, I do write code for a living so I am far from a luddite.
Social networks are not completely useless - Twitter, Facebook (and here in Brazil, Orkut) are useful tools to find old friends you lost contact with or to start conversations and point to interesting things you find. I get many tips from the hacker news popular feed.
But I really, really don't care for the farms people manage, the hearts people get and so on. I don't need a second job managing a farm.
I do think that Twitter is useful for self branding. Especially if you are famous. For me though, friends are old friends for a reason. If I still want to talk to someone I have their contact information.
