Slasher,
you forgot one other aspect of SLF stupidity - the habitual undoing of seatbelts as soon as the light is out for seemingly no reason.
I am always amazed at the chorus of clicks I hear on passing through AGL 1500 as the seat belt light goes out. Why do this? - putting your head through the overhead bin is very painful (had a chance to see the results of one attepmt on a QF Classic that had a power surge to the elevators back in '89 - very messy) and I for one can't even feel the seatbelt when it is loosely fastened in the cruise.