>They can write that in their terms & conditions all they like, but it doesn't make it legal or enforceable
That was In response to "It is against Facebook tos to create or use extensions that alter the experience".
When you say "that doesn't make it legal", does that not imply you think something is illegal....? Regardless, I see from your comment that you weren't talking about the page removal, but rather going on a tangent about the legality / enforceability of the ban on creating and using extensions that alter Facebook (as opposed to banning pages n Facebook that promote these extensions). We're on total agreement on that.
SF-guy can write his app, I can use it, and FB can delete his FB pages. No laws broken.