During Mardi Gras, French Quarter hotels post security at all entrances and require hotel guests to show their key and an ID before they're allowed to enter. However, the rowdiest partiers and the up-to-no-gooders simply shimmy up the wrought iron poles to the second floor balconies. It was a real problem until they started greasing the poles with a heavy coating of vaseline. Problem solved. LOL. Might work with squirrels, too.
Might, but these are incredibly resourceful....and tenacious... squirrels. I had squirrels at the old place too, but they weren't nearly as sharp, agile and determined as these are.