Should be locked up, if only for a week or so.
I once had a guy come up to the checkin desk and when I asked the security questions he said, "Yeah, al queda have been messing with it." Got the security guy over who brought the police to the checkin. The airline duty manager made it clear he wouldn't be travelling with said airline again, but the police released him after a few minutes of questioning.
Madness.
HS