Your argument strikes me as knee-jerk cynicism. Facebook wants to be around for a long time. Facebook wants people to get value out of their site. This isn't a

Your argument strikes me as knee-jerk cynicism. Facebook wants to be around for a long time. Facebook wants people to get value out of their site. This isn't a get-rich-quick scheme where the objective is to strip-mine their users. A necessary condition for Facebook making any money is that people enjoy their service. If they don't implement it, it's because they don't think it'd be valuable to enough people to be worth the opportunity cost of having people implement it, not because they think it would hurt ad revenue. It seems to be a popular sentiment that any ad-supported company hates their users, and I don't get it. It's true for spam but it isn't true for companies that want to be around for more than a year.