Grass Killed by Tenant Usage

[Rich C.]

I wanted to get some opinions here. I own a duplex and one of the tenants has a punching bag stand for exercising in the backyard. Basically you punch it as you move around it. Problem is it forms a ring of killed grass around it. And, the tenant keeps moving it onto new grass when it dies. It's creating a decent amount of dead grass that is getting progressively larger. My thinking is to ask him to keep it in an area where the grass is already dead. Any thoughts here? Am I getting too involved?

Thanks.