The seals of Solomon are not controlled by demons. Solomon was given a ring by god, on which was carved the true name of god, and it gave him power over demons. The seals come about from him using the ring to imprint binding symbols on the demons. The seals summon specific demons and bind them so that they are required to do one's bidding. They do not allow demons to control you or do anything other than what you want. So there's really no harm in using the seals to the user. If the seals aren't drawn right then you don't even summon the demons let alone have a weak seal that lets them escape or whatever horror movie plot people think would happen. Solomon was a great magician, it's not like he created a system that didn't work. If the circuits also summon and bind demons, then who cares? It's not like it makes the computer evil. They're doing your bidding.

I wish the satanic panic people would actually learn about the shit they're scared of.