First off, this thread is derailed and has no need to be on forums all i see is multiple guilds being assocoated with individuals actions when it is uneeded.
At the end of the day if people are trying to rank up they are going to do it in the most efficient way possible the people that seem to be complaining are the people that are generally low ranked and pvp "for the sport of it" if someone sees milky and other high ranked high skilled people in a 10v10 wsg then you look at your team and everyone is rank5 or lower (generally inexperienced) you might try for the first cap but afterwards your gonna give up, take your mark, and requeue hoping for better next game.
Does everyone do it? No, but the majority do and will continue 2 without punishment. If there is an edge to get the hardcore player will look for that gain it is up to blizzard, or in this case, nostalrius, to fix it. Being banned for it whether it is or is not against the rules is silly.