Bombproof Liner Tested in Commercial Airplanes
yahoo.com
yahoo.com
It's a nice idea. Containing a troublesome passenger inside something like that seems overkill unless they're wearing some sort of bomb.
The thing to remember is gases can penetrate fabric. If such a miscreant (it's HN, so I won't give my usual description) came aboard wearing a bomb with a chemical agent underneath it could leave the crew with a big surprise.
Edit: Fixed a copy paste error.