I think is the best idea for some people to do that. However isn't good this idea for all people. Airlines is offered with this idea. For lower ticket prices you should make your seats smaller and the service to do not work. For people that don't have much money is good. In this way you can do and economy You have not to pay salary for staff for service. In the other hand if someone has many hours flight, he want something to eat or to drink. If someone is overweight he can sit on the seats if you do it smaller. However if you don't low the price in the tickets you can pay some people to service food or drinks or you can let the people bring a toast or something on his own, and in this way you have not to pay for staff. In my opinion don't stop the service cause some people wanted that. I hope I help you with my suggestions.