I don't understand. How hard is it to grab someone's hand and move it up and down?
Madness string 19980
You would likely observe more overt displays of aggression from people playing an innocuous, yet challenging, game like Candy Crush Saga, as opposed to a game that is little more than shooting down anything in your path.
I have found in practice it is rare we get an open battlefield, and when we do it's because we're facing a literal army.