When I rate songs, I sometimes just throw 3 stars on a song to get it out of my unrated playlist (especially if the song interrupts a few good songs and I'm in a rating groove). Because of this, I created a playlist I call "Hasty Decision?"
My Rating is - 3 Stars
Play Count is less than 5
Comments does not contain "Real Rating"
After about 5 plays, I think a songs rating is no longer just a number I threw on the song to get it out of another playlist. This playlist will defeat the purpose of giving a rating to a song just to give a song a rating. And if I really feel a song is worth 3 stars, I can add a comment to mark that.