If people who were posting actually checked the site as they are prompted to do before posting, they would see the previous postings and answers.
On the other points, I have a feeling I know how the system will work if the 72 hours notice of flying is instigated. You give your details beforehand to the airline who submit them. When you arrive at the airport, you put your passport in a machine and, if approved, you get a computer readable card which you keep with you until you get through at the other end, have your holiday and then leave the country. You will have to enter the card in another machine at the airport before you fly back to confirm that you have left the country. If you can't get the card from the machine initially, you can't go as the airline will not allow you on board.