So? Most people don't want constant out access from the information they have there. The one important asset, photos, already can be easily extracted.

If you choose to use Facebook, you choose to play by their rules. Nobody forces you to pick them over anybody else.

Walls are irrelevant if you have the whole world inside them. Facebook doesn't need to cooperate with other elements because it is a behemoth. There will always be a minority which wants to see more outside access, and Facebook can appease them, but they don't need to go in that direction for growth. The way out for them is reorganizing and adding more features to tie people further to the service.