Re: Well isn't that just great
"The difficulty comes down to who decides."
That's not hard at all. When it comes to things legal, most nations have very clear delineations about who gets to decide what is and isn't legal.
My problem with your assertion that legislative bodies shouldn't be asking questions of companies because the companies are engaging in activities that are legal effectively neuters the ability of those bodies to determine whether or not those activities should continue to be legal.
So, just because Facebook may not be (or might, we don't know know) violating any laws in no way means that legislative bodies shouldn't be asking those companies very hard questions.
In terms of what's right and wrong, we each decide for ourselves, intentionally or not. I conduct my life according to what I think is right and wrong, and I decide who to associate with and what companies to do business with by the same "rules". As do you.
Although I would be completely overjoyed were Facebook to go out of business, I am not amongst those who call for blocking them in the absence of lawbreaking. I think that investigating them (and the other companies like them) is an excellent idea, though, so that we can determine if new laws are needed, or if they are violating existing laws.