I log into facebook about once every three months, usually when someone tells me in meatspace 'I sent you something on FB', like the invite details to a party. When there I have a poke around, and see how banal the day-to-day feed is.

On the up side, I sometimes have a chat with a random friend I met on my travels, but that in itself is not worth being sucked into the facebook machine, which is basically treading social water.