Re: Roku now makes more from "platform", which is mostly advertising, than player revenue
Amazon is off my HW purchase list, and the Kindle NEVER has its WiFi on.
Use a laptop to drive HDMI on a "Smart TV". Don''t connect it to WiFi or ethernet. Sony seems to have now provided a way to disable Samba (The ad info company, not Windows style shares on Linux). I'd not trust it.
I'd not use the Google TV stick or Apple TV, Amazon Fire etc. Also Amazon "kindle app" on Tablet / Phone / PC reports everything. Only the eink Amazon and USB mass storage with WiFi/3G off is "safe". Use "Download to PC" option for a physical reader if buying Amazon ebooks. Smashwords is better, though without the big 5 publishers.