I've said this before - these people have a hobby similar to trainspotting. They loiter around cashpoint machines collecting discarded bits of paper with different sort codes on for their collection. They always wear jamjar specs, shell suits with the bottoms tucked into their socks, have greasy hair and usually some arresting physical defect. Many have a talent for drooling and pointing at things in the sky. They're completely harmless and eventually move on to other hobbies such as collecting bus tickets or rootling about in skips or bins. If you want to wind one up, next time they ask questions on here, give em a spoof answer, such as "that sort code belongs to Coutts Bank, Buckingham Palace branch." It will send them into a frenzy.