Restaurant Service Fees

A few months ago there was a post by someone on this sub whining about the automatic gratuity and I dismissed it as someone not used to it. Saturday, however - I was presented with my bill that had an 18% "Service Charge" and in big capital letters it said "GRATUITY NOT INCLUDED" so they have this handy dandy calculator at the end of your bill - you're expected to tip on the subtotal *including* the "service charge" - when did all this start? In case anyone wonders the restaurant was Lona.