Having root access to that computer means they can do a lot of throngs they aren’t supposed to. I fail to see this as anything but a security breach for this.
There is a breach as he released the default password, but no one attempted to breach it, as in no one tried to use the default password on their computer. Did you even try to understand what you read?
Europe is doing it. Look at Apple vs Spotify, as well as Apple forced to open their app stores to 3rd parties. Those are consumer oriented laws. In the USA, lobbying prevent those from happening.
Your camera’s focus most likely looks for hard contrast vertical lines in your picture then racks the focus through its range and looks for the sharpest transition between those contrast lines. In this picture you can see that all the vertical lines have very high and sharp contrast.
I had an LG Tv and was able to open and separate the LCD from the panel to clean it but I guess it depends on your specific model.