Well the address would be registered into the Slock.it system, so you have proof that a certain lock belongs to a certain address.
In a way though your point still stands, a user could always claim that someone else put the listing up or someother situation beyond their control, UNLESS there is previous history within the slock.it ecosystem, which would be very easy to see.
But you can prove that you controll an address. To solve your concern you only transact with people who have proven in a publicly verifiable way that they control the address they provided you with.
Re:New Kid on the Blockchain
by mootothemax on Monday March 28, 2016 @12:53PM
(#11375449)
>To solve your concern you only transact with people who have proven in a publicly verifiable way that they control the address they provided you with.
And how can those people prove that they didn't receive your money?
As in, I want to dispute that the address you've sent money to is under my control.
Do you, though?
One large problem with bitcoin is that you cannot prove that you don't own a given address.
IF this is also true for Ethereum, all you really get is proof that you sent money to an address; not that the address necessarily belongs to anyone.