Guild Wars 2

Ok so today we are holding Bay, the outer wall goes down, then the inner wall. We repel the attackers and repair the inner wall and then proceed to defend. Sometime between the wall going down and back up at least 3 thieves get in and start taking out the siege on the walls while perma stealthed.
We kill one of them and his buddies, still perma stealthed, try and res him a tiny bit at a time. 30 minutes he was lying there.

My question to a dev is this:
If a player is inactive they get booted from wvw after 5-10 minutes? So why is a player allowed to lie there dead indefinitely? Its one thing to wait 2-3 minutes for a repel to end so you can wp to bay or hills rather than go back to the start/ garrison but to be able to lay dead for 30 minutes seems a bit excessive.

I know at least one person will post that it is a valid tactic because it ties up the opposition but to be able to do it indefinitely is a bit much. They should be returned to the nearest wp after a certain amount of time imo.

I would have to test this theory but I want to say that if people are trying to res the defeted person then the game mechanics treat this person as an active member of the battle and not as an inactive player.