They were in our attic and walls and chewed up all the flexible air ducts. $3,800 of damage.
Not a single one made it to see Christmas.
A few scouts have breached my perimeter this past month with the introduction of peanut butter suet to my bird feeders, but they know their interest may be deadly. So far they remain about 50' from the house on their recon missions.
We had a bunch get into our attic one winter. They chewed a hole in the ceiling right over the dining room table. Hubby finally got them dispatched, and found where they got in and blocked it up.