I have only logged out of fights when there's mad lag and I don't have the patience for it or I have to leave for some reason due to interruption (like my gf has a 4 year old). I have probably done it like a total of 5-6 times in the past 6 months. I apologize for that.
I have decided now that if that happens again (unbearable lag or I get interrupted), you can have the knockout.