When I lived in suburbia I once permanently removed over 50 squirrels from my backyard in a month. I'd catch 2 to 4 a day in my two traps with BOSS as bait. They were so thick in that neighborhood that new ones would move in as fast as I removed them. I even hooked a neighbor on trapping them but he only took them to a local golf course to release them, those squirrels probably beat him home. I'm confident Monty will know how to permanently remove the squirrels assuming he resorts to live trapping them, but they need to be released several miles away to keep them from just going home. If Monty wants suggestions on how to live trap them let me know. It's not that hard.
Squirrels are like a lot of other things. They aren't too bad until you get too many of them. My problem here is rabbits, not squirrels. I'm constantly thinning rabbits out. In suburbia the squirrels were so thick I couldn't plant anything or pull weeds and disturb the ground or they'd dig it up, maybe looking for buried nuts. The final straw was when they chewed the flashing from a roof vent so I got a lot of water in the house in one of those south Louisiana thunderstorms. When that happened they got thinned out.