Some things I learned from Logan's Run
Mega-cities of the future are constructed from old matchboxes and wobbly cigarette packets.
Mega-cities of the future look suspiciously like 1970s shopping centres.
An entire mega-city of thousands of people can be fed on a small number of its dead inhabitants.
If you are going to a lawless part of the city filled with violent gangs, make sure you take a scantily dressed female with you.
Fourteen year hoodlums of the future look and move like undersized 25 year old extras from West Side Story.
Computers explode if they receive information they don't like.
If you are trying to sneak into a mega city of the future, simply dive into a pool of water with no idea of where it might lead or if you can get back out.
People who live in post apocalyptic cities with nothing to do all day never bother to explore more than a few miles around their home.
Mega cities of the future where everywhere is patrolled by armed guards and omniscient computers will still have lots of unattended and abandoned areas where you can sneak out from.