Of course there is no need to accept. Only those who volunteer to play by a code would do so. This is really aimed at "White Only" players who win playing white and then run.
There's no fall from grace for those who "run" after having won with White. Some people just like to play a game and call it a day. They are unconcerned with those who feel they should have a right to attempt to settle the "score," recognizing that the opponent's feelings over losing are hardly relevant. I just think such considerations have nothing to do with honor.
And that is why you would not qualify. Just have the courtesy to explain you are not up to another game. Be friendly!
I'd like to see an 'honor system' members could join. Members take a pledge. Upon taking the pledge the member receives an icon by their name.....a blue star, or...? All Blue Star members promise to play using the rules of the pledge.
Gold Star members pledge:
No Cheating, no trash talking, no intentional disconnects, accept a rematch or state why unable to do so. No running out the clock.
There are probably more principles....ideas?
Perhaps the 'Blue Star' members could have special tournaments....perhaps some exclusive benefits
I posted in my blog a topic about my personal "Code of Ethics."
Here: http://www.chess.com/blog/JamieDelarosa/my-personal-code-of-ethics