Proving it is the hard and expensive part. I don't really have the time, skillset, or money to buy a bunch of LG or other branded IoT devices, put them in an isolated test chamber and then try to decode all the RF noise come off them.

That being said, all the technical requirements to do the things I suggested in my previous comment currently exist in those smart TVs. All that was preventing LG from doing that was consumer trust, and they've clearly thrown that in the garbage. At this point, based on previous behavior, it should be assumed that they will go as far as possible to exfil customer data without their consent or knowledge, until proven otherwise.