Maybe, maybe not. Demons are far stronger than humans are, even at their weakest, and even then, demons in a contract are outside my control, since contracts for all demons are absolute, no matter what.

[So yes, some people could be in danger, but also... Those same contracts could also save them, if worse came to worse.]

My friends back home, they still have their COMPs, and I trust them in that they're not going to cause any problems, and are probably even going to work together to destroy any other ones that are modified to summon demons, since without those modified ones, demon summoning and contracting becomes a lot harder.