Well if all they are doing is medal farming why not? If i'm playing with some PuG's that are afk'ing i'll stay because you don't get comms if you quit.
I'm in a pretty good PvP guild and when i can group with them its no problem but when all the groups are full i gotta solo que.
I've sometimes played WZ's for 3 days straight without a win (not QQ'ing because i've also hit my daily's and weekly's in one nite).
It's just aggravating to be on a team that doesn't care when i am trying my best.