Well I bet they didn't quite expect that. In the wake of Facebook's F8 conference this week, where it apparently bid to become the new Sheriff of the Internet, Facebook's plans to effectively put 'social' into the very structure of the Web has a few people a little concerned. The main issue is that there are concerns that Facebook, by default, now opts you in to allowing third party sites like Yelp to 'personalise' your experience, and there are questions about how much information is given away. The result is that lots of geeks are considering leaving Facebook, and perhaps even more interestingly, veritable droves of Google software engineers are among them.