Another fairly common example is with facebook where you can access profiles with names, like facebook.com/lessnonymous.1 . I got fairly tempted to check other

Another fairly common example is with facebook where you can access profiles with names, like facebook.com/lessnonymous.1 . I got fairly tempted to check other people in the world with the same name as I have so I incremented the number myself. I am not sure that facebook intended their website to be used that way