Many people accept answers immediately when it answers their question. However, if they had given it more time, they can receive more answers that may be better than the original. Similar to the "Remember you can accept this answer" message box, I think a message should appear when the question poster hovers over the accept answer button.

This message would say something along the lines of "Are you sure you want to accept this answer? If you wait longer, you may receive better answers." (just wrote that up to get a rough idea of what it may say). The message would appear if the question was asked recently, maybe 6 hours at least.

What do you guys think?