very much depends if another business wants to get at restaurant for any reason, i.e. a competitor.
I do think it is a bit of a ridiculous law to have in Greece. I have often seen Greek families empty whole containers in restaurants onto their salads, with much left on the plate when they finish. Wonder if the restaurants will start to charge next year or introduce those sachet thingies, like the fast food chains have in UK.
Does seem like an idea as mentioned on other thread to bring one’s own olive oil.
Would it be breaking any law to leave your bottle of olive oil by a restaurant you frequent often, like people used to leave their own tankers by bars