Once in 1982 I was fishing in a 6 man raft with my wife and daughter when a drunken waterskier decided to try and drown us with a big wave up close from his ski. As he proceeded to send all that water our way, he dumped it, right next to our raft. Thankfully, in those days I was not armed. But he and his drunken buddies got a very stern sermon while my wife was writing down their boat REG #'s, and that evening they were on the sheriffs list of DUI boaters on that lake. Don't know if they got in trouble or not, but we never saw them again out there.
On the other hand, once while float tube fishing a popular lake, a foxy gal on a jetski actually stopped a ways from me and stating how she hated those jetski's and all their racket, watched me catching big slabs and bull bluegill for quite a while, asking questions and being very nice. Actually made my day better. Wish there were more like her, who will shut their machines down and do the calm thing and flirt awhile...