It's wild how convenience trumps everything and then we look back to say, "we should have done better."
Sometimes it helps to have someone with their priorities in order keeping a reality check on people who don't always stay grounded.
I think maybe being grounded has changed - I would be comfortable doing what I described but I imagine your comfort with your preexisting solution means your ground has shifted and a reality check means you woudl rather give away your data than take the higher friction option?
Yes there are many (maybe most) who will not give up their comforts or risk modifying their vehicle in order to make it more private... but trying to play the judge in a made-up internet game of altruism olympics is not going to convert many people either.
I meant to gracefully share what I did, and hope to have no offended anyone.
Never underestimate the risks of spousal dissatisfaction.
Regardless, taping some foil around the connectors with the foil making okay contact with the metal chassis is more than enough attenuation at sub GHz microwave to remove this concern without having to source specialty terminations and crimpers (or worse, non-reversible damage to the OEM cable assemblies by repurposing their terminations). I've done the foil+tape on some of my vehicles, but it hasn't made a difference in binary "does it connect or not?" testing.
If a hypothetical future owner feels strongly about it then replacing a telematics module in the dash is much easier than replacing harness runs. I somehow doubt I would sell one of my vehicles to someone who would do that though.
If your buyer is the end owner, probably increase a little bit unless they are surveillancemaxxing.
Easily reversible mods only affect price for suckers anyway.