Can the US government strand a US citizen via No Fly List?

[grude]

http://www.independent.co.uk/travel/news-and-advice/planning-a-trip-to-canada-or-the-caribbean-us-immigration-may-have-other-ideas-7584912.html

One million British travellers planning to fly to Canada, the Caribbean and Mexico this year face the risk of being turned away at the airport – at the insistence of the US Department of Homeland Security.

New rules require British Airways and other airlines flying to certain airports outside America to submit passengers’ personal data to US authorities. The information is checked against a “No Fly” list containing tens of thousands of names. Even if the flight plan steers well clear of US territory, travellers whom the Americans regard as suspicious will be denied boarding.

I saw some speculation about these new rules that it is an attempt to stop US citizens abroad on the No Fly List from just getting a flight to Canada, Mexico or a country in Central America or the Carribean and then crossing into the US by land or boat. And also to stop US citizens inside the US from leaving the same way, as this case shows:

Oregon Muslim on U.S. no-fly list held after sailing to Britain

British authorities today detained a 23-year-old American Muslim convert who traveled from Oregon to the United Kingdom by train and boat because he says he is on the U.S. government’s no-fly list, the Associated Press reports.
Michael Migliore, a convert to Islam who graduated from Portland State University this summer, has been detained by British authorities after sailing from New York en route to Italy, where he planned to live with his mother. He says he is on the U.S. no-fly list.CAPTIONBy Michael Migliore/APMichael Migliore, a dual citizen of the United States and Italy, had tried for months to fly to Italy to live permanently with his mother but was denied.

So can the US really put a US citizen that is currently outside the US on the No Fly List and basically strand them? What happens when the country they are in wants them gone(assuming US citizen is their only one and they don’t have permanent residency etc).

And wouldn’t it be easier to just not issue a US passport to US citizens they don’t want traveling? I could swear I have heard you don’t have a right to a passport.

[Alessan]

Somebody should really challenge the constitutionality of the the No Fly List.