Apart from their current president, I have no axe to grind with the lads and lasses over the pond except this miserable pestilence of tipping. It's an infection. Just returned from a tour darn sarf and wherever there are American tourists, so are the tip bags, cups, boxes. This doesn't mean that the price of the attraction is in any way decreased, it just means you're expected to put your hand in your pocket again. I have no doubt that guides and tour staff are properly paid so why pay them a second time? Where the tourists are European, there's none of this nonsense.