I agree that the player should not get personally involved in someone else's bad behavior in a casino. But he could very well complain to the suits! Whether they would do anything is another story, but at least he would have voiced his displeasure of the situation. As for you advice to BELLA about only playing one coin in slot machines, the only advantage to that is it prolongs playing time, but reduces the chance for any large wins. Playing three coins gives you a chance at a large win, and only speeds up the process of expected loss. You can't have your cake and eat also.
To not play max coins in a machine is bad advice, as far as I'm concerned. Math always screws things up when it comes to gambling. Hit a jackpot when playing one coin....see how you feel. So what you don't last as long....there's always tomorrow. Go for the ninth wave. 777
The amount you win with three coins is merely a multiple of the base game. You play three and on those multiples you lose three times the amount over time. The difference is usually only in the jackpot which will be several hundred dollars more than the multiple. This is not enough to make it worthwhile to almost triple one's losses. Anyway that's how I see it.
It is all relevant, if both slot players invest the same amounts over time, the 3 coin player is expected to come out better than the 1 coin player. The 1 coin player is increasing the HA of the machine by eliminating the chance to win the larger payouts. Now, I agree that if the 1 coin player plays less money over time than the 3 coin player, they are expected to lose less. The casino's incentive for offering high pays on 3 coins is only to get more action at say a 6% HA, rather than get a HA of 8% on a 1 coin play. Taking the conglomerate of all players, it is a big advantage for the casino to encourage 3 coin play, even with the reduced HA. But for comparing two individual players, it is a matter of the total amount of money played....if it is equal, the 3 coin player is at an advantage over the 1 coin player.