Paul - I enjoyed your story greatly - though I am surprised you bothered to assist the twat who fell off !
BUT........ I think you'll find its the majority who are sensible etc & the minority who are complete dicks . I was once a seadoo owner and had to regulary use my bottom of the range 80hp seadoo to tow ski boats, dinghies, yachts & even dare I say the odd RIB back to harbour. Nowadays you cant buy a new ski with less than about 155 bhp !
I would agree though that the drunk idiot type who exisit can graviate to jetskies as they are pretty cheap , easy to drive etc - but then the same could be said of ' some' of the ski boats, day sailors & dare I say some RIBS.
I was soaked by an SR4 heading out of the harbour this weekend & when I asked him to slow down ( I was actually polite at this point) he gave me the bird and raced off , only to nearly eject his mate from the bow over a wave ! In a similar way to you wifey stopped me from doing a smart 180 and giving him verbal going over.