I'm deliberately not mentioning names in this...I'm sure many would be surprised, especially poor tippers, at what is added to the plate before the server sets in front of you with a flourish.
A former Irish Taoiseach (Prime Minister) used to take guests to a particular restaurant which he reckoned had the best steaks in Ireland. He particularly raved about the special seasoning they used on the steaks.
Turned out the chef really hated this Taoiseach and his politics; so when the waiter told him the Taoiseach was in the restaurant and had ordered a steak the chef would undo his flies and rub the steak on (well, you get the picture) to 'season' it.
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I used to go skiing with some American friends in Austria. My friends and I had been going to this paticular hotel for years; it was a 4* place where the staff would be as formal or as informal as the guests wanted. So for some guests it was a very a traditional service; whereas we were on first name terms with all the staff. Whatever, the service, food and accommodation was always to an excellent standard. (We'd all stayed at various times in other hotels in the village and reckoned this was by far the best 4* hotel in the resort.)
One year there was another party of Americans who simply couldn't complain enough about service; food, anything and everything was not to their liking. It was really beginning to upset the staff because no matter what, there were always more loud complaints in front of all the other guests. It really upset my American friends because it was the sort of behaviour that would give all Americans an underserved bad name.
So in the end my friends went had a word with the complainers who eventually admitted that nothing was wrong they just liked to "keep the staff on their toes". To which it was pointed out that upsetting a young waitress at meal time was a pretty bl**dy stupid thing to do since she had friends in the kitchen...
They got the message.