NBC 5 Article
"Sixty-five passengers bound for Indianapolis were forced to evacuate their flight late Tuesday morning after one passenger found a note on the plane that contained a possible security threat, though a search of the plane later found no explosives or other problems.
American Airlines Flight 1672 to Indianapolis departed its gate at 11:24 a.m. and was taxiing to a runway at O'Hare International Airport when a passenger found the note in a seat pocket, according to American spokesman Tim Wagner.
Wagner said he could not release the contents of the note, but said members of the flight crew believed the note contained a possible security threat and notified authorities."
I guess some people can't pass up the opportunity to be stupid.
If I find such a note, it's going right into the trash.