Especially if you write, but even if you don't.
The Google book deal is something I keep meaning to try to get my head round, especially given my not particularly famous stance on e- as the inevitable direction of a lot of reading, and now there really isn't time, and I bet that's what everyone thinks. It's the same is facebook and privacy, which it isn't like at all: something profoundly transformative that happens with not bad intentions and done by mostly people who have never had anything particularly wrong happen to them and who go about it without imagining the worst-case scenario. I am simplifying radically.
I'm glad Nick Harkaway has simplified it less radically, and I profoundly agree with him. Also, read his book. It's really good.