[Squeek]

It's been around since 3.2.2. So, a week.

Before, when you got reported, you were flagged "Inactive!" with a debuff and unable to receive marks or honor. You could remove it if you engaged in combat. You wouldn't get kicked from the fight no matter how many people reported you though. You'd just take up space.

Now, when you get reported, you have one minute to do something or you're removed from the battleground as if you'd gone /afk.