There would be noting wrong with ads if they were always opt-in. Even if that included all the privacy-invasive tracking. You want ads, you turn them on. What

There would be noting wrong with ads if they were always opt-in. Even if that included all the privacy-invasive tracking. You want ads, you turn them on. What is infinitely more invasive are ads that are on by default, that do not give you the choice of not seeing them in the first place. The audacity to push an idea on to you feels like a shovel across the face. If you are lucky you can opt-out (on the web usually with an ad blocker) and in the case of ads in public spaces you are just out of luck.