Hard Fork Lock
Recently a lot of talk about hardfork. I found a video as it is possible to use it profitably. With a fork you can lock the door, as in slock.it )
The Fork Lock is easy to make. This lock is very useful when wanting to add a little extra security to a motel room, public restrooms (which often have broken locks), or on any interior, or exterior door.
"We have elected to put our money and faith in a mathematical framework that is free of politics and human error." - Tyler Winklevoss
Well, that's basically what they did, right? Ethereum miners working within the mathematical framework tuned out all the politics to rid itself of human error. Just one way of looking at it.