By next year we shall see the result of the Libra development and if its going to be a successful launch, do you think one day we shall see a facebook login button on exchanges like binance? Would you login to it?

I have seen this on websites like medium.com. Worse is taht not only binance but also kraken and bittrex

I think if a login is exchanged using Facebook, this is very bad, and obviously bad. If something happens with our exchange account, do we question the exchange about the problem we are experiencing, or we will ask the Facebook owner. Because this is one thing with two different databases.
if there are option like that, then i will decide to register with email instead of linking my personal facebook since we do not know how secure our information with that . And there is much secure to use email registering since its much safer facebook account is prone in hacking.