I am 70 years old and started playing poker about 2 months ago. Sometimes it's great fun and we get a bit of banter going, but more often than not there are one or two people who try to spoil the game for everyone else and I take great delight in beating them. I have never read a poker book but learned to play by watching high stakes poker with Danny Negreanu , Sammy Farha and the like, and to me these people are real gentlemen even when losing huge sums of money. I think some of your players could learn a lot from them especially good manners.
Reward good play and behavior