...Humans don't "own it".
Until the rodents start pitching in for property taxes and maintenance costs, they don't own anything.

Seriously, I have my problem now because of my live-and-let-live attitude. When I first saw them moving into my yard, they were well away from anything that could be damaged so I let them be. Big mistake. Huge mistake. That wasn't enough for them and now they're tunneling under my sidewalk and it looks like their work caused the landing slab for the steps off of my back deak to sink and cause damage to the stairs.
This is now war...