I'm not a troll, I just know enough to respect when people running a website want to use their rightful authority as its owners to gather information, at least on a moral basis, versus when it is on an immoral basis, which would be if it's deceptive.
A website (at least those that end in dot com) are private property. It would be like recording footage of someone in your own home. All you need for that is basic transparency.
I am talking about both legality and morality, but they both refer to different aspects of all of this. For my case, I go by morality, but that doesn't mean certain aspects are necessarily illegal either. Selling info to a third party isn't a necessary part of the equation and not a part of what I was saying when I implied "as long as it's not deceptive".