It's a 'no' from me.

Maybe, maybe it'd be okay if somebody opts in for this feature with the option to opt out.

But Imagine the fun if I just got pulled in just after I leave to AFK,tank sees they got a healer, pulls, wipes, gets angry that there's no healer there.

And if I am doing something else, I'm just gonna take the 30 min penalty for leaving so I can continue with what I was doing. And then probably not be too pleased I got pulled at random, and I can't imagine the group I was forced to joined would be happy either.