If that was the case then why not just fly back to the place, pick out the tallest building, and do a header into it?
For that matter what good are hostages if nobody knows you have them? And there are no remote landing strips that plane could have landed at. Its not a Cessna and you can bet every possible landing strip it could have used, within its fuel range, was checked by now.
Nope the only things that could have happened is A, The plane was hijacked and the crew and passengers fought back. Eventually doing a Header into the ocean. B, The a member of the crew decided he'd had enough of life and wanted to leave it with a splash. Either way that plane is at the bottom of the ocean. I read an excerpt from a father who's only son was on that plane. The poor guy was devastated and really put a human face on all out theorizing.
I feel for the familys.