Jesus bloody Christ! I cannot believe some of the naive and idiotic posts on this thread.
The facts of this case are as stated in Huh?'s post above. This man pleaded guilty to writing the terrorist-style notes that prompted the diversion of this aircraft into Iceland, at great financial cost to the airline and greater emotional cost to the passengers (who, I imagine, will be contemplating civil action against this idiot). His actions would be totally despicable at any time, let alone in a period when the travelling public are still somewhat traumatised by the events of 9/11 and since.
(The US, as the destination country, asked for and received jurusdiction from the UK and Icelandic authorities as is provided for in international aviation law).
How could you possibly consider defending this man's actions through a petition - especially when many of you apparently knew (or cared?) nothing about the facts of the case? How would you feel if it had happened on your aircraft?
Frankly, they should have incarcerated the despicable fool and thrown away the key.