A general observation: On many social network sites there is a hierarchy of „post" and „comment":
post
comment
comment
post
post
comment
comment
comment
post
That is not the case in a classical messsage board like the Straight Dope Message Board.
Here it is
post
post
post
post
with a new post not conspiciously replying to a specific prior post, unless you quote part of a previous post that your post refers to.