Former presidents are prohibited from using public roads. Most likely, it became a ban after George Bush admitted in an interview that he had been driving on public roads for 25 years. Although this rule was followed by all previous presidents before him. And this is the non-drive safety rule that was adopted after the assassination of John F. Kennedy. Perhaps one of the former presidents would like to secretly order something at home or surprise a loved one in this way. But he is not allowed to do it! And secret service agents always find out about it! Because they check any delivery to the ex-president. The ex-president also can't just walk into the Apple Store and buy the latest iPhone. Before buying a phone, he needs to get permission from the Secret Service.