Honestly, I'm torn on this. What we're talking about here are compensated machines from the 'bad old days' of near enough wild west style 'regulation' (such as it wasn't), many of these machines are running code that's 20, 30 or even 40 years old - and whilst any arcade that still has these machines on site will almost always be running late rechips that took out the most egregious emptiers, manipulators, methods etc, all of the worst characteristics of compensated machines will still be present and correct.
However, in the context of retro arcades that are preserving history and making these machines available to play, in adults only environments, as long as those attending the venues are made aware of what they're playing, for me that'd be good enough.
So you have a sign up in the entrance to the venue that reads along the lines of - 'MANY MACHINES IN THIS ARCADE ARE COMPENSATED AND DO NOT ADHERE TO CURRENT GAMING STANDARDS, THEY ARE PROVIDED FOR ENTERTAINMENT PURPOSES AS LEGACY DEVICES. THEIR BEHAVIOUR IS HEAVILY CONTROLLED AND COMPENSATED, AND THEY MAY PRODUCE RESULTS THAT ARE UNEXPECTED OR UNFAIR.'