Those were great. I hung around a forum around 2004 where someone posted a link to jeans he just bought from a smallish online store - the URL contained the PHP

Those were great. I hung around a forum around 2004 where someone posted a link to jeans he just bought from a smallish online store - the URL contained the PHP session identifier. Thousands of people had instant access to his address + bank information + purchase history, and could place orders for him.