The Grapple Reaper Strategy

There are strategies similar to titfortat that are much less forgiving. And they have this great name that economists call the grim reaper strategy, this massive retaliation strategy. So while this mass of retaliation seems like a good idea because it gives the biggest incentive for the other guy to co operate, in this context where you can't talk and an publicly commit to it, it's a very ineffective, dangerous strategy.