Rating Glich ?!

Once a game is over you can leave all players ratings.
Sometimes someone develops anger during the game because
you win. Then later when you have forgotten about that particular game you see a sudden drop in your rating average.
But then it's to late to give that person the same rating back.
Can something be done about this, like a note or something when someone rates you , or always being able to rate people no mather how long it takes afther te game ?
please advice !
Thanks
Mitchell
Sometimes someone develops anger during the game because
you win. Then later when you have forgotten about that particular game you see a sudden drop in your rating average.
But then it's to late to give that person the same rating back.
Can something be done about this, like a note or something when someone rates you , or always being able to rate people no mather how long it takes afther te game ?
please advice !
Thanks

Mitchell