That's an excellent point, and I agree - not just here, but in practice as well - I go out of my way to respect the GPL and similar licenses for my own work and others'.
My respect of copyleft does not come from a want to adhere to legal terms, but instead an appreciation for what those terms hope to achieve more broadly, and the positive impact they have on society. As I described in another comment, I do not owe FAANG respect or legal cooperation it doesn't reciprocate.
Of course, if you feel like it's your duty to run the web without adblockers, I understand that, and more power to you.