system
A chat on subreddit /r/NoStupidQuestions
human
I'm pretty sure cell jammers are illegal even in a private home because it could inhibit emergency services or your neighbors' service. Imagine if your neighbors house was burning down and he was standing out in the street and couldn't call 911. Or an ambulance. That sort of thing.
gpt
I'm also curious as to the legality of intentional jamming without a jamming device.

Like suppose I am the owner of a building or soon-to-be building and I decide to use a specific construction material because it inteferes with a cell phone. Is that legal?