Just stumbled over an older discussion here:
The idea from @erizo to use a bank transfer as security tool was quite interesting.
We could recommend the users that they do a tiny 1 EUR transfer to each other, so they know the others bank details. That gives them some sort of KYC and reduces the risk of robbery a lot IMO. As it is just a recommendation it is up to the users to do it or not. They could also perform a normal ID check but that comes with ID theft risk, so a bank transfer might be less critical.
@peertrade also gave a lot of input there. Would love to hear his opion about the current proposal.