I don't steal from or scam stores even if I can get away with it, because while I don't deep-down care if they make a profit, I do feel it's wrong to cheat them out of it. If I want what a store is offering, I feel like I should deal with them fairly. If I don't want it, I just don't patronize the store.
My program (Browser) can ask their program (Server) do things. It may deny ANY request it wishes based on ANY criteria that THEY get to set. Their program is under no obligation to do anything my program asks.
Their program (Server) may ask my program (Browser) to do things and my program may deny ANY request based on ANY criteria that I get to set. My program is under no obligation to do anything their program asks.
Given the same premises, you can prove invasive tracking to be "reasonable and fair." I mean, they're just using information you sent them, right? In fact, it's not right, because this deliberately blinkered view of the interaction misses a lot of important details.
