There are a lot of smart TV's (name-brand ones!) that will try to connect to any open wifi. Monetizing from analytics and telemetry are literally priced into the cost of the gadget. A lot of smart TV's will even ship with their cameras turned on. And Hyundai/Kia and Subaru literally disabled certain in-car features for people in Massachusetts after the repair bill passed (https://www.wired.com/story/right-to-repair-cars-hackers/)
Given that, I hardly think that 'decoy sims' are much of a stretch.
Given that, I hardly think that 'decoy sims' are much of a stretch.