Since most of HN doesn't know, there's a big difference between grey/fox squirrels that most people see running around outside and these red devils. I would argue most haven't even seen these, they are smaller, more skittish, and typically only live around areas that have a lot of pine trees.
For one, red squirrels aren't quiet, they bark and chitter all the time for warning calls or territorial challenging. They aren't social so much as combative. Extremely territorial and destructive to housing. These are the ones that will eat through wood siding then destroy attic insulation on their quest to overwinter indoors and store tree nuts inside the walls. When it's not pecan nuts rolling by in walls, they are beating the shit out one another or barking and chittering as you or your pets are nearby. Sound, smells, ultrasonic, predator calls, all ineffective to get them to leave a space once they settle in. If they have young, you can't remove (either by relocation, plugging up the hole they made, or killing) until the young is out or they'll die and stink up the house. Even if you do plug a hole, they'll spend days trying to get back in barking and scratching the whole time.
I can't think of a wild animal I hate more. Exterminators don't have a high success rate against them, traps are rarely effective (and they learn fast if they escape), and the amount of damage they cause is obscene.
https://www.autobodynews.com/index.php/industry-news/item/20...
(Random dealer site which lists it for sale: https://www.collegehillshonda.com/product/4019-2317.html)