Like all generalisations (even this one) that is completely incorrect. I believe there are a lot of people in US custody who are denied that right?

I'm not saying they shouldn't be where they are, or that they should have the right to leave, but your blanket statement is wrong.

Also see Dmitry Sklyarov for an example of when stepping on the wrong corporate toes can get you into all sorts of trouble in the USA.

Just see what they tried to do with Assange and Kim Dotcom.

They could've done that countless times with less public people.

that's not true, both in terms of citizenship and geographical position