most of the ways that users could send to a wrong address involve having a malware on their computer, in which case these users are also susceptible to a lot of different attacks and can lose their money in much easier ways than simply sending to a wrong unintended address. your solution is also not going to solve anything, the same malware can intercept the communication between A and B and change the address to its own.
other ways that involve user typing in a wrong address are already protected by the checksum that each address has in place which means they won't be able to pay to a wrong address because of typos.
I fully agree with what you said, I mean, if you get hacked or you got a malware on your PC, you may lose your bitcoin funds. There's a lot of ways, like for example when you would like to send some bitcoin to an address, the address will change automatically without even noticing it, otherwise even if you type your address wrong and was a typo you'll be safe because the system only send bitcoin to only valid addresses.other ways that involve user typing in a wrong address are already protected by the checksum that each address has in place which means they won't be able to pay to a wrong address because of typos.
I've seen once someone sends me few bitcoin but then he was able to cancel it before the first verification, which it's one of the ways you could do if you send your bitcoin to a wrong address, but I don't know how he did that exactly.
