Yes, and it is legal, and commonly done. You are allowed to broadcast a cell phone tower signal and MiTM the connection. You are not forcing others to connect

Yes, and it is legal, and commonly done. You are allowed to broadcast a cell phone tower signal and MiTM the connection. You are not forcing others to connect to your signal. The spirit of this freedom is even emblazoned on every compliant device, look for the FCC warning. As for jamming, that is entirely unrelated, not comparable, and illegal. It would be akin to blaring loud music and lights.