In South Africa we have similar problems.
Any form of physical hitting is construed as abuse and here if one is witness to it they have to report it, even once. if not they are liable for disciplinery. we have to take strong lines due to past transgressions.
parents camping we hugely discourage, it doesnt give the boys or girls a chance to expand and be themselves. children behave a certain way infront of parents and another way when folks are not there. be firm and polite and explain when planning for an outing drop off is this time non-participants leave this time and collectio