"It's like receiving free news every morning, but you have ordered a kid who delivers them to cut out ads."

What's wrong with that? What laws is that breaking? I'm not even sure that's breaking any social contract.

That's actually completely fine. You're allowed to do that.

Personally I use the free newspapers they unwarrantedly deliver to my house as a firestarter.

Actually, you are explicitly allowed to decide what the site does, insofar as display is concerned. If it's client-side, you can do what you want. And blocking ads does get people somewhere - a less annoying internet.

As for your analogy...again, you're allowed to do that.

Actaully, the HTML of the "newspaper" directs my browser to connect to a bunch of other sites to download the sales flyers separately. I simply decline to fetch the ads. It's not like the website "puts ads in" and I "cut them out".