Yes, in fact the "ethics" is written clearly in web standards principles:
> 2.12 People should be able to render web content as they want
> People must be able to change web pages according to their needs. For example, people should be able to install style sheets, assistive browser extensions, and blockers of unwanted content or scripts or auto-played videos. We will build features and write specifications that respect peoples' agency, and will create user agents to represent those preferences on the web user's behalf.
Exactly. Inundating information with intrusive ads works directly against this goat, so blocking those ads isn't just your right, it's a moral imperative.
> 2.12 People should be able to render web content as they want
> People must be able to change web pages according to their needs. For example, people should be able to install style sheets, assistive browser extensions, and blockers of unwanted content or scripts or auto-played videos. We will build features and write specifications that respect peoples' agency, and will create user agents to represent those preferences on the web user's behalf.
https://www.w3.org/TR/ethical-web-principles/#render
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And guess who is one of the members of World Wide Web Consortium: https://www.w3.org/membership/list/?initial=g&ecosystem=
> Google's mission is to organize the world’s information and make it universally accessible and useful.