no they know where everything is, cameras are all round and in the end they all find there way to where there goin, then if there returned they go in dead letters then to that massive royal mail sortin office - anyway stealing mail is a crime against the crown you get in big trouble for doin it, once that letter is in that postbox it belongs to the queen untill it cones through your letter box!! u steal and orf with your head!!! lol