Lol nice to assume the worst case
I had this two times unintentional.
I had a horrible game where the game laged from first second.
Three enemy players with sim speed of 1 - 2.
I played 15 minutes or so and it got even worse.
We seemed to lose anyway so I minimized Demigod and started playing WoW.
Because demigod needs large ressouces for an strategy game my pc went quite slow and after some minutes I was droped.
In my case it was not intentional but I still would do it again (playing WoW in a horrible game).
So perhaps he didn't caused the lag on purpose too?