Lack of Security
I quite like random little anecdotes/stories/tales, so thought I’d share:
There’s an office here that the porters look after the keys for. If you want to get in the office when there’s nobody else around, you have to ask them for a key; they check your university card against a list of people who are authorised to borrow keys.
So here’s the kicker: anyone can give in a new key list, even if you’re not on the old one. They don’t check, they don’t care. If this was a program, it would be the most horribly flawed code.