I can't speak for shminux, but for me (weighted possible future effects of more surveillance) + (visceral disappeal of facebook in general and it recording my activities specifically) would be significantly greater than (a few additional seconds of inconvenience)

[Some of this might be rationalization, especially the visceral distaste. I was about to add a term for the possibility of my behavior being broadcast to my acquaintances in some manner, but I realized I had thought of that after making my decision.]