While not disagreeing with what you said, such "grab a drink from the fridge" things are always in a monitored environment. There are no unlocked public fridges even hyper-high trust societies like Japan or Dubai.
No.
In baltics, northern EU you can encounter countryside unsupervised apples, tomatoes and even honey where you take it and put money a box. No camera.
Also, even with cameras, it is little help of I am a tourist.
In Switzerland, I was in such a store in a mountain village.
I visited there once - no point trying to find me if I stole something.
