RE: A look back at some legendary posts from Bitcoin Talk.
In regard to the point that Hal had activity on the Bitcointalk forums after he died, see this post by an admin:
I kept his account unlocked because I thought his family members might want to look at his PMs or something, but this is looking like his account was almost certainly compromised. So I locked his account. The person who controls his account gained access via email-password-reset, so his email is probably also compromised.
Additionally, here are the two posts that were made from his account in 2017. I really don't think Hal would say "I am risen"....
Segwit needs to be activated. I am risen.
For the record, I do not support anything that Jihan or "Crooked" Roger are doing with BU.
It's fun to speculate that Hal was Satoshi but I think it's equally or more likely that Satoshi willingly vanished from Bitcoin in order to keep it in line with his "vision" - completely decentralized (no figurehead). Though I suppose that's a different debate entirely.