WestPointer; you're obviously an intelligent man!
Seriously, I mean this in a positive way; being of a punishment culture, where everything that is not expressively allowed is illegal (sure admire countries where is it the other way around; make life easier - as I understand the US); a little expansion:
I have opponents who disappeared; I will report the game as a win out of courtesy to my other honest/faithful/disciplined/hard whatever you choose to call them opponents.
I have opponents who abandon a game with more or less lame excuses; well, I accept it, but won't play them again. No report.
I have opponents who have to put the game on hold indefinately, because of real life issues, I hope to see them again and will rejoice to have the pleasure of taking up the game again. No report obviously.
I have opponents who stick it out when it is obvious they will gain nothing, better to throw in the glove, they are excellent and admirable!
In the end we all know what opponent we will accept or be happy play in the future, don't we? So my point is, rather than punish the bad oppponents, credit the good ones. So a system which allows positive feedback, but not negative, would be ideal. In the end, the lousy opponents will stand there with no positive remarks, enough indication...
Saves the earnest loads of time and effort.
Just my rationale.