You didn't answer my hypothetical. Do they have the right to ensure that I am looking at their ads? I don't see how they could, I can always look away. In th

You didn't answer my hypothetical. Do they have the right to ensure that I am looking at their ads? I don't see how they could, I can always look away. In that case, what is the effective difference between that and ad blockers that control what code/images run/display on my computer?