I had an uncle who would go to a local buffet (Sir George's?) in the 60's or 70's, and stay all day long. He did smoke a lot of weed, so I'm sure that contributed.
If they kicked me out of a buffet, I'd expect it for free, or at least half price.
I did get an AYCE dim sum place in Jakarta ($6 for lunch), that started adding in extra rules after I started eating there frequently. It soon became minimum 2 people. And not long afterwards, they sold the restaurant after 30+ years of ownership. I wonder...