A whole section would be better. Because with a single thread, multiple things will get suggested. The discussion of those things would get all mixed up, and just make things a heck-of-a-more confusing. Just imagine it for a minute.
With the single threads per idea/few ideas, it allows the discussion to carry undisturbed and organized. A plus if you really want it to get considered, as I don't think that any of the staff would like to sit around and put the pieces together.