Tangential anecdote: I have a TCL Roku TV, and recently switched to using an AppleTV playing through one of the TCL HDMI inputs. I was incredulous to see that R

Tangential anecdote: I have a TCL Roku TV, and recently switched to using an AppleTV playing through one of the TCL HDMI inputs. I was incredulous to see that Roku was analyzing the signal of that port, identifying the shows I was watching, then overlaying an ad onto the AppleTV signal to sell me the show (that I was already in the middle of watching?) on a Roku channel. There was an opt-out in the Roku OS settings, but I hadn't realized just how invasive this monitoring was. The point being that you can't necessarily simply opt-out of a smart tv by switching your media player.