It would not be intrusive if it the sticky comments were not unfolded initially.
A sticky comment thread is not always stickied for its parent (root) comment, but sometimes for a sub one down in a thread.
My initial idea was to encourage users to read the sticky comment.
That's why they are in a post main comment section.
Just like sticky posts are in sub's main (/all/hot/top) section. It wouldn't make sense to have sticky posts showing on top of a menu inside each post.
Ah, I see.
(post is archived)