Actually, it's possible to implement in it an unobtrusive way that makes users feel more comfortable. The huge popups usually comes from the same websites that do popover ads (that commonly end up invisible and blocking scrolling with adblock) and auto-play videos.
Most of the time it's a small bar on the top or bottom of the screen. Stop whining.
Again, blame the web designers who don't even do enough diligence how others do the same. And demands of proper, obvious labeling is one of the better tools to stop companies from putting useless crap everywhere.
I don't see this. Web is filled with advertising, new laptops are filled with crapware. Labeling didn't do nothing to stop these things. What we get from lawers on the web are idiotic terms and conditions, "I agree" buttons under the wall of text, copyright craziness with idiotic cease and desist, persecution of people publishing secrets or just snooping around. I think if lawyers kept there noses out of the web it would be much safer place.