smokers
"maybe there were 6 sky marshalls" - I hope so for the safety of other people not smoking.
"perhaps the KLAS smoker did not joke about attempting to light his shoelaces" - true, it was a large pale-white woman who could not wait for a smoke 2 hours into a 3 hour flight...and burst in to tears when the flight attendant told her she would be met by the authorities in KLAS. There goes the gambling money :-)