There are clear methods to decide if a company has dominant position or not. It has nothing to do with whether you can use another one or not. Perhaps you don't have an idea what you are talking about.
Yeah, I'm gonna bet on me and my law degree for being right about that. Whether Facebook is in a dominant position is for the court to decide.
You on the other hand are a funny... dude. Haha, "dude" he says :)