I've been telling people for ages to not trust ISP provided hardware. Notice the vague language here which means they reserve the right to share private information for anything that might be called an investigation, or for any dispute which includes them (didn't pay your bill?), or a subpoena.

    Subject to applicable law, Comcast may disclose information generated by your WiFi Motion to third parties without further notice to you in connection with any law enforcement investigation or proceeding, any dispute to which Comcast is a party, or pursuant to a court order or subpoena.

Plus, sharing isn't limited to a court or law enforcemnt agency - they reserve the right to share information with any third party.

This is scary, particularly considering how the current administration wants to weaponize everything they possibly can.