I wouldn't have turned them off.
Same here. I would have said them to go fuck themselves, because I wasn't listening to Verizon. When you buy a product, it has some warranties that it doesn't cerate some junk.
Would be a dick move. Clearly the rigs are causing interference. FCC certs simply mean that when you use your
graphic card as intended by the manufacturer, i.e. sitting in a 'puter case, displaying vidya, your won't cause RF interference. It does not mean that your
graphic card won't cause RF interference if, instead of using your
graphic card as a
graphic card, you h4xx0r the firmware and run a boatload of
graphic cards propped up on a rat's nest of
antennae risers to mine crapcoins.
Your microwave oven is also FCC certified. Please don't misconstrue this as a license to defeat the idiot switches & run the thing with the door open & complain that it interferes with your WiFi. It wasn't designed for that.
Why is this difficult to grasp?
Well, you're right, but what would happen if I would be countinuing to use it ?
Probably nothing. Just like nothing would happen to you if, instead of throwing your trash in a garbage can, you threw it in the street. But it would make your city a shittier place to live in, and there is a chance you'd get a ticket for littering. If enough people behaved like you, cops would be told to start enforcing the littering laws more diligently (read: be dicks).
Same with shitting up the RF spectrum -- you can get away with it 9 times out of 10, tho it makes life worse for everybody. After you have been warned to cut it out, you could get heavy fines & your gear could be confiscated (though that's pretty unlikely). If enough people act like you, the FCC might create more/stricter regulations, making all electronics more expensive.
Here's a link:
http://www.arrl.org/part-15-radio-frequency-devices (ctrl-F "Digital device:§ 15.3 (k)")
TL:DR: Don't keep doing bad things just because you can get away with it.
I would at least ask them to pay me back the price of the cases.
But you're the one breaking the law (see link). Asking the Verizon guys to pay you to stop breaking it is ...idunno. Those Verizon techs are just working stiffs, they're not your enemies. If you don't let them in your house (you don't have to), they simply check a box in some form & then d00ds who you *do* have to let in show up, and the whole thing escalates