(I think you meant opt-in) How would Facebook be able to innovate if everything they released was opt-in? This isn't some privacy-leaking piece of the site, it

(I think you meant opt-in) How would Facebook be able to innovate if everything they released was opt-in? This isn't some privacy-leaking piece of the site, it is a feature that helps one of their core components be better. This is definitely cool technology, and FB does have the right to do whatever they want. Kudos to them for also providing a switch to allow users to turn it off. However, "How would Facebook be able to innovate..."? Isn't having a FB account opt-in? They're not exactly in a dearth for more users - if they want people to be happy with the feature, then educate and sell the feature to them. If they're worried that by providing an option, people will ignore it and some developer's pet project is going to remain unused, then you might as well consider this feature mastubatory: FB is having fun doing face detection, and the users are getting nothing out of it.