[kiwiref]

I think that the problem is not going to get any better in the future. Just ignoring the idiots will work to a certain extent, but eventually they will see the lack of action from the officials as a tacit approval for their behaviour, and things will start getting worse. This means that the very nature of how we manage the game will have to be slightly modified.
Here's what I would like to suggest. Establish a code of conduct for for parents, and make it very clear that breaches will result in eviction from the venue. Second, make the home team responsible for enforcing the rules. Any breach that is not being dealt with appropriately will lead to forfeit of the game at the discretion of the referees, and a possible financial fine later on. Yes, this would mean that the home team will have to organise security arrangements to be able to deal with idiots. But that's a small price to pay compared to the cost of an increased number of referees refusing to work certain areas/associations/schools etc. Also, we are already struggling to recruit new referees in many sports because young people do not want to put up with the abuse they are witnessing. So, I say time to clear up.