alt Hacker News> Why isn't it automated yet? You delay your rent and your door key stops working.
1) Because screw you, that's horrible and you shouldn't do it.
2) Because all these digital key systems are horrendously insecure and much more open to thieves and crackers than than a plain old door key anyway.
(1) - what's horrible? renting out flats is a business. not paying the bills shouldn't be tolerated, ideally shouldn't be technically possible.
(2) is negated very simply - have both old door key AND digital security key which auto closes if there are unpaid bills for say more than 5 business days.