I NEVER AFK, regardless of unbalanced the match is. One time, my team from the get-go was 4v5...none of us quit and although we lost with less than 50pts, we felt in our hearts that we won. Never AFK...you may see it as feeding the egos of the other team who are unempathetic, but see it as an opportunity to improve. See it as an opportunity with how long you can last 1v2, 1v3ing them.