Like the title says, I need help in determining if it's an example of Disrupting gameplay behavior, that is bannable so the next time I see it, I'll make screenshots and properly report it.
Earlier today I joined pvp raid for "For the Alliance" achievement. Some people warned us at the beginning that this was fake raid and it will fail, but like other 40 gullible fools I ignored them. Turns out they were right. Raid leader was cooperating with 3 other BiS players. They used the following trick: prot pala tagged the boss right before the raid attacks, survives attacks and then get the achievement or the kill. While whole raid gets nothing. Turns out they have been doing it for some time now just for fun. They have done it twice today (all 4 bosses if you believe the hearsay, but I saw them kill 2 bosses right in front of me), and no idea how many times before. It's a huge waste of time (around 2 hours) and we can hardly do anything about those trolls through game means, discounting creating second account and making BiS Horde pvp toon.
So, is it disrupting gameplay behavior or just some unavoidable risk you take when joining pugs?