4) was actually pretty common. However, some places wouldn't even change notes so that people could play the machines, which seems pretty daft. The excuse of "we don't have the change" could be addressed by making it known that they would change coins back to notes for winners.
However, fellow players would often change notes for coins or vice versa as a service for mutual benefit. There was also an advantage in having loads of pound coins in a place where change to play was hard to get, as it meant people abandoned "buzzed up" machines due to lack of change
If you were deemed to be on "someone's patch", there would sometimes be an unofficial "X times bankroll walk out" term applied out in the car park I did once have this term applied to me in the car park of Knutsford services in 1996, but it was more an opportunistic levy, rather than due to being on someone's patch. Some regulars also tried to apply such a term to me in the 1980's in East Reading, but they failed.
However, officially the worst that would happen is being thrown out once you had "won too much". Taking the money would be deemed a theft or even a "mugging", and would have the arcade owner taking a trip down to the police station. The online equivalent is probably the bonus ban, although there have been instances of players being banned even from playing without bonuses for winning too much.
ahhh the good old days.......although not in your league vinyl many moons ago i won my first jackpot at south mims truck stop, while waiting to pay for my fuel i found myself just sticking a fiver into a machine called cashino and won £500.00 quid, but in those days the machine payed out in pound coins with no way to change them to notes, so i had to stuff 500 pond coins into my trouser pockets.......no mean feat i can tell you....i had to walk back to my truck looking like john wayne on steroids and thats without trying to climb into the cab....