Quoted from jgentry:Preloading a pile of credits is poor etiquette. Winning them is one thing but loading up for a couple hrs of play is a no no. Put your money in, play your game out, look around to see if anyone is waiting on the game, if they are not start your next game.
If you preloaded a bunch of credits you were in the wrong, the guy was a bit of a tool about it though so I see you as both being wrong.
Sometimes the credits are set to encourage preloading - 75c per game 3 games for 2 bucks, etc. Besides, sometimes you need a few games to feel out a machine/warm up, etc. Its not like this was the only game in the room. Too bad, so sad, but if the op paid for or won the credits, there is no ethics or etiquette involved...