Outraged -- if you didn't want to tip then you probably wouldn't want to go back either.
The feedback/ tip/ booking aspect of it works particularly well in the beauty business where a building a steady clientele is important. People who find a fit with a hairdresser are likely to come back and everyone will be happy. A hairdresser will generally pay better attention the second time a client comes for a haircut and it is assumed the client will not fume in silence but will provide directions about the haircut and will also give feedback in the form of a tip. Many British people are reticent about telling people what they really want and will fume in silence.
With restaurants, steady clientele is not that important. Tips can vary greatly and for a great variety of reasons. On the whole it is the ambience of the restaurant that determines the tone of the service. Wait staff in Dennys know they will make less in tips than they would at Le Tres Expensive Steak Place down the road but in general they will be friendly and do their jobs capably just as the staff in the steak place will but with a different tone. The performance of the wait staff will harmonise with whatever atmosphere the restaurant wishes to create and not perceptions of the customers' tipping practices. You are going to get folksy treatment in Dennys and you are going to get a more hushed experience in exclusive eateries.
'I just think that's a horrible attitude towards customers. Level of service should be consistent, consistently good, and not dependant on how much someone perceives you will tip.' Level of service really doesn't depend on assumptions.
Same with the situation where they give you your bill whether or not you are ready to leave or not. They have just spent all that time being faux cheerful and interested in you, but they can't wait to get rid of you because they want the next tip.
I really don't understand why there is this perception of being faux cheerful. I don't understand why the business transaction aspect of eating out is missed by diners. Are you so unused to people having a positive, cheerful demeanour that you mistake cheerful service with someone being interested in you ? They want feedback about your meal so that they can do their job and bring you exactly the meal you have in mind. They make light conversation about your holiday because it is polite and your accent is something to chat about. They assume you have plans for the rest of the night when your meal is eaten. It's not that they are getting rid of you and it was all a sham designed to extract your money from you under false pretences. Yes, the table will be prepped for the next customers and they will earn the next tip -- the fact that this is taken personally as some sort of insult is really odd imo.
I can't understand how there is a problem with being presented with a bill by a smiling individual. You know how much your meal cost. You know you ate it. Would you prefer an apology along with your bill? Or a glum face? There is the assumption that you are cheerfully spending your money in the US if you go out to eat.
If you are not ready to leave all you have to do is say you are not ready to leave just like Americans do. You can order a coffee or a dessert and cheerfully spend more money. British reticence makes for a lot of miscommunication.