I'm going to be honest with you, if you are thinking that Disney or any other property, store, company, will police these guidelines 100% you will be disappointed. If you are thinking of coming expecting this to happen I recommend you save your money, not saying it in a mean way at all, it's just reality.
Where have you been where you have seen 100% policing? They would need to have a CM per family entering each park, to walk around with them at all times to make sure they are following rules