There is no comparison Dunnital to what you suggest.
//A waitress/waiter picking their nose at your table? Some one serving you in a shop spitting on the floor? Half naked guy serving your table? //
The only one of those remotely acceptable is a half naked man because we've had topless bar staff for quite some years in some places haven't we? All of the rest are health hazards. No-one ever caught salmonella because they bought a baguette of someone with ' I love Margate' tattooed on their arm.
The only time I will say we discriminated against someone with a tattoo was a guy with a swastika on his hand, who had seen my father and explained that he was looking for work and had had it done some 20 odd years earlier when he was very young and that he certainly didn't hold opinions which correlated with his tattoo now, and could he possibly be considered for work where the public wouldn't see him. He did come to work for us and it quickly became apparent that it was holding him back form a far more suitable job so it was arranged for it to be tattooed over and covered up but I must admit we would not have allowed him near the public until that was done, but to me that's exceptional, and any non offensive tattoos don't present a problem.