One Comcast guy got in my face. He claimed the “terms of service” of my Comcast Xfinity agreement “gives Comcast the right” to enter my house and yard “at any time.” I refused entry and told him and his buddy to leave immediately.
The next day I got a call from a “Comcast technical supervisor.” He says my Comcast service is going to be cut off (and I would be liable for a large financial penalty for “early cancelation”

unless I let him and another tech in my house.
What I didn’t know is they were calling me from right outside my house! They started pounding on my door while he was on the phone. Again I had to rush around like a crazy person shutting down everything and doing odor control to keep them from smelling my marijuana plants.
I opened the door and told them don’t go showing up at my house all of a sudden and demanding entry.
To my amazement, they pushed past me and started going around the house looking at wires and the Comcast Xfinity equipment.
I thought I was going to have to physically stop them if they got near the grow room, and I kept telling them to get out of my house, but the “supervisor” was woofing off that he detected “radio frequency interference” coming out my house and it’s messing up other peoples’ Internet, appliances, cable service, remote control devices, etc.
I told them there’s nothing wrong with any equipment in my house, and that I considered them to be trespassing. They left.
Then I called the hydroponics store and they said yes my Lumatek and Galaxy digital ballasts do put out radio frequency interference (RFI), and so do some HID bulbs. RFI interferes with electrical gear, and can be detected from outside your home.
They said you can find out if you have RFI by having an AM radio on and walking with it in and around your marijuana grow room, house, and yard. If you hear static that’s not there when your ballasts are off, the static is caused by hydroponics digital ballast RFI.
Apparently, the only hydroponics digital ballast that doesn’t have radio frequency interference is the “Baddass ballast.” Too bad I hadn’t bought that one. And I need to get some RFI-blocking grow room insulation that makes it harder if not impossible for RFI to escape my marijuana grow room.
A few days went by, and then Comcast contacted me saying they wanted to come back to my house, but I said hell no.
The next day, my Xfinity service went down. Comcast had disconnected it and charged me an early termination fee.
I later learned that Comcast has a habit of narking people out. They detect radio frequency interference, and/or they use their access to your home and yard so that they see indoor and outdoor marijuana gardens.