A lot of them has started even locking down the serial interface. Hell even the boot logo on most LG TV's these days are signed.
EDIT: One thing that "might" work is a repair remote / repair menu. On the LG TV's in my house the repair menus allow you to change things like what HDMI mux the TV is expecting (I can't recall if the WiFi Module was included in such menus, but if it is you could change it to something its isn't and hopefully break connectivity. I'll have to dig out my repair remote and play around in the menus again).
might is not a smart tv. I will need one sooner or later, so i am going to look at corporate televisions. Like in meeting rooms, and hotels that dont have this smart cack into them. Just a good panel, with honest HDMI ports on them!
Yep, the other good ones are for "commercial signage displays". No one wants to pay for smart garbage on those, so they're usually just good panels with ports.
EDIT: One thing that "might" work is a repair remote / repair menu. On the LG TV's in my house the repair menus allow you to change things like what HDMI mux the TV is expecting (I can't recall if the WiFi Module was included in such menus, but if it is you could change it to something its isn't and hopefully break connectivity. I'll have to dig out my repair remote and play around in the menus again).