The same goes for seperate queues. Nobody says premades can't play ... other premades.
And I am not gonna relist several reasons for not wanting to group up. You cn either accept that some people pug or not. Makes no difference to me.
Anyways the result will be the same: No seperation -> puggers will likely quit PVP.
Let's seperate blacks and whites. No one says Blacks -can't- play... with other blacks.
Please read the above statement in the most ignorant accent you can do.
(Also, you won't relist them because... there aren't any good reasons to be a 24/7 PuG.)