This is strictly a hypothetical: if I’m not a Comcast customer, and I cut a Comcast line off my house, do the Comcast cops come or do I just get to carry on living my life
The Comcast Cops sure didn't care when their lines weren't working correctly, and they either didn't notice, or didn't care when I removed their lines and splitters after when we got a different provider.
I know many folks in LA who have done this with no consequence. If you are not paying for cable or phone, they’re never gonna know / care. But LA is bit of of a sprawling, lawless territory so ymmv depending on where you live
When I bought my house it included some complicated abatement for the power and telecom poles on the property. I’d need to consult a lawyer on the details, but >99% sure cutting any of the wires is legally bad.
I am a lawyer and I kind of did this without checking. I switched to fiber, and remodeled my house, including removing and patching over all the cable outlets/inlets. In my experience, even if a home is already wired, when you order Comcast, they rewire everything anyway.