I'm thinking they would need to get quite complex - eg. what happens if someone posts to your 'wall' - who controls the visibility of that? Simply moving to a d

I'm thinking they would need to get quite complex - eg. what happens if someone posts to your 'wall' - who controls the visibility of that? Simply moving to a different site might be a more convenient solution for most people. Especially if these 'all-in-one' programs become more popular.