I’ll admit I didn’t open the article, as far as I’m aware the best way to sidestep silly requirements like warrants is to just purchase data intended for advertising. Databrokers really have an amazing wealth of info ready to be tapped into, all you gotta do is pay.
I’ve played around a bit with Remotely (https://github.com/immense/Remotely) from what I’ve seen it’s great for when a family member needs some remote support, it also has persistent agents for some stuff. Personally for remote administration I LOVE Apache Guacamole, it’s super handy being able to use RDP/SSH/vnc/etc from a browser.
Edit: after reading the post it may not be what you’re looking for. I don’t think either of those would be good from an FPS standpoint.