How long do you thing it will take the dictionary to catch up to the meaning of the word "thread" as used here? Alternatively, what happens to the meaning of this non-thread if we substitute some of the dictionary definitions?

Don't post to this fine cord of fibrous material.
Don't post to the spiral ridge on a screw.
Don't post to something that is thin.
Don't post to your clothes.

There are also some interesting definitions for "post" -- I like the ones that are nouns the best, so if we reverse the statement and say "Don't thread to this post" we can get even more interesting combinations. It also allows us to use some of the verb definitions of "thread."

Don't connect by running a string through an upright support for a fence.
Don't machine a spiral into a military base.
Don't proceed in a winding fashion to a guard station.
Don't drop thick liquid from a spoon to put a letter in a mailbox.
Well, the possiblities are endless, especially if you start using synonyms for "post" and "thread".

CarolC, have you ever run "CarolC" through a spell checker? You get "caloric". Is there some meaning here? (meaning on this thread?? Ha!)

John