No, that would have a strong "damping effect" on much of the comms here.

That's for signaling/logging you "really are" someone. That has a place and can be quite useful, e.g. when that is important. I don't really think HN one of those places.

HN thrives on pseuds, for good reasons.

HN doesn't even need/use "sign in by Facebook". HN is quite simple, and it works well enough as designed.

That would be like, for OfficialProfileHackerSocial.com or something. It could work, but it would no longer be HN.