With Bitcoin you give them a brand new address that is tied to nothing.
With Bitcoin you give them a brand new address that is tied to nothing.
The US is behind the rest of the world on this one.
Facebook makes this even worse in that is exposes a lots of the commonly requested bits of entropy. It's not hard to identify someone's mother on Facebook. From there, you can identify her parents (if still alive) or brothers and cousins, to get her maiden name. Now if your birthday is visible or published anywhere, an attacker has yet another bit of entropy. Add enough together and an attacker now has enough information to walk into a bank agency with your bank account number and possibly gain access to your account.
TBH, we're at the point where it shouldn't be legal to secure accounts with any method that involves multiple bits of entropy. Any system that permits someone close to you (friends or family) to pretend to be you simply isn't secure. These days you don't even need to bother with power of attorney because it is so stupidly easy to impersonate one's parents, significant other, sibling, children, etc.
This is by design. You can identify "relationships" in Facebook, and they will display who your mother, brother, sister, even cousins are.