If someone else responds to your thread it will automatically return to the top of the page, which is not a problem. I'm referring to people who are posting within their own threads with the sole purpose of bumping them back to the top of the page ahead of everyone else's posts. If there is a legitimate interest in what you are offering, then by all means it should be at the top. If there isn't, let it fall to the bottom of the page and let someone else have their turn at the top.

Justin