Forum topics pagination and posts anchors

I cannot imagine a way to make your example work : http://base_url/thread/{threadID}/post/{...pid{postID}

This url is a topic url showing posts (and #xxx a specific post). But if there is a pagination on that page, and it sure will be a pagination because we don't want 100 posts per topic's page, the problem is still the same.

Sorry if i don't understand you but:

http://base_url/thread/{threadID}/post/{...pid{postID}  (your example)

or

http://example.com/forum/forum-slug/topic-slug/#5  (my example)

they are quite equals, and the pagination will break the post targeting in both cases, no?
maybe i miss something...