[PlaceFan]

> "Zuckerberg" seems to be more frequently used than the full "Mark Zuckerberg".

Eh, I'm not sure I would agree with that.

> And quite a few Hackers seem to be on a first name basis with Elon and Linus.

They have fairly unique names. It's extremely unlikely that "Elon" and "Linus" would refer to anyone other than Musk and Torvalds in the context of HN discussions.

Definitely not the case for names like "Mark", "Bill", or "Steve".