"I know it won't last, but I like to make the spoofers work for it :D"
I'm pretty sure those accounts are partly controlled by a program as well so their owners don't have to be awake and logged in 24/7.
I know a few gyms that are controlled by bots just like you stated above. The same accounts fight and train the gym right after you took them down. No one's ever near the gym and the accounts move so fast from gym to gym you can't even beat them with a car.
Nonetheless, hope you find some players that are willing to fight against the bots with you!