The syetm works fine for poeple who challange at worst one time a day. For poeple who arent the buggers, but rather the defenders.
When it comes about people who tell, defend yourself! and then challange, it is very problematic.
You just have to put yourself on their side to understand how annoying it can be.
I have myself never experienced the problem, but people with whom i as fighting did.
You know, i don't like to challange, i like being challanged. I don't like suprises when the person accepts when is near me, just to actvate the macro miliseconds after accepting the duel.
So i decline the random challange, and the person start ic explanations, so i tell that person to challange me again, but.... you already know what happens^^
Now tell me the system is beatifull. Ok, an ignorant will say that, but ask you to stop being ignorant and tink about others instead of you.