@Brian-And-Jennie0 very good question I would also like to hear some ideas how to prevent AC misuse
For now the only solution we found is to give our guests thin bed covers during summer to prevent them to overuse AC during the night (they often tend to cool the place on 20 C (68 F) constantly and then use all extra bed covers.
Interesting is that during winter they heat the place on 23 C (74 F) or more ! (We have notes with C to Farenheit conversion so there is no excuse for not knowing.)
I have to tell that Americans misuse AC more than any other nation even when they could easily adjust the themperature by simply opening the windows at morning and evening and put the blinds down early afternoon... or just use a ventilator.
I've heard about some AC systems which allows you to preset temperature so guests can not change it and some solutions where you can adjust the temperature using WIFI from the distance and I would like to hear some info about it.