Oh right, I’ll scare you all a bit more again with some more information I just remembered:
Coercion.
As explained in the long post above, there has been a certain small region (I won’t say which, because that’s against the rules) where it became a social norm with the prevalence of these rulebreaking premades, that if a “random” came into the premade’s BG, such as AV for example, then they’d force this random to do what the premade said.
Now, the way they could force their way like this, is because there’s a right-click AFK report implemented too, for people on your own team. If only one reports a person, it does nothing. If only a few reports a person, it “marks” that person as afk, and will kick the person from the BG after a minute of not having entered PvP combat.
If a lot reports a person for being AFK, it instantly kicks the player from the BG.
So with this system, the premade would get rid of “non-cooperative” randoms in their BGs. Or if they just didn’t like the class/spec the player was playing, or didn’t like the gear of the player because it was “too low ilvl”.
This became the social norm in this region.
This might become a social norm in Classic, if they include that report system too. They’ve already included the automated right-click reporting for other things, so no reason to think they won’t do it for the BGs.
While it never became a social norm in the EU-English servers over on retail, it might become that way if the premades starts mimicking this behavior.
Because the difference between the large EU-English region and the smaller ones, was that the smaller ones could run their premades by manipulating the queue timing.
So the premades are the main cause of what led to such a social norm forming.
These days, this particular small region rarely runs premades anymore, due to how many of the other regions having dropped in the amount queuing, but the social norm of not tolerating that low ilvl or having to obey the BG leader still remained.
It’s highly toxic.