In France it is considered a Revenue offence to take things from planes, as they are not subject to taxes. Plus the theft of course. So it has happened that the Customs police have charged someone for coffee sachets, cans etc. I know that it has happened (a long time ago) that someone on seasonal contract was teminated because of that.
Luckily it doesn't happen that often that people take things from the airplane here, except opened water bottles for the hotel. If they do it, they are very careful not to be seen because it is not something that people like. It's finally just a matter of company culture.