Drinking beer in the stands is next to go here.
First the media began targeting "beer throwers" during games, then KNVB introduced a rule that any cup being thrown would halt a game. Every game from that point on was halted for a while. At the same time a minister randomly proposed to ban alcohol sales at all sports clubs (amateur clubhouse included) but this was bounced since all amateur sports would go bankrupt.
This was like 1 or 2 years ago, I don't know what the current situation is but I'm certain they will try again.