I stopped using "real name" facebook quite a while back, after noticing how invasive all those facebook-enabled sites are. In terms of invasiveness, I think facebook beat scorecardresearch and doubleclick (and all the others) long ago, and I plain refuse to see how most, if not all of the facebook offerings that demand to get my friendbook facelist would explain to me what they intend to do with all that free data.
Also, playing zookeeper, mobster or farmer really gets old after awhile, especially after, say, half a year of interacting and trying to make sense of the lives of all those people you've only befriended because you needed that social gaming boost, whoring out your friends and loved ones and total strangers just so you wouldn't have to wait another hour, a full day or cut the throat of a newborn lamb the next full moon.
With all the recent changes - yeah, I am happy to have the option of easily interacting and sharing with folks that live on the other side of the planet, but it's really come a long way since it was that student-centric little project. The number of idiots and total twats on facebook also makes it rather hard to "like" and I've since grown really, really bored with the very concept of "liking" things except if they throw goodies my way that are worth it. Hello, xfx, I really like you. Now, send me that graphics card like you promised. Here, have a long list of people I barely know in return! T'a.