Seriously the brats aren't going to remember it and will disrupt the parents enjoyment.
Usually because the parents have no one to leave the kids with so they are forced to take them. I took my kids to Club Med years ago because they had a kid's camp and I was able to enjoy myself while the kids spent the day at the camp. No way I would have done it otherwise.
No they are going to disrupt all the other guests who are childless or had the sense to make arrangements for their kids to have sitters.