It might be realistic for you, or me or anyone in here, but it definitely isn't realistic for the average user. And it's them we try to protect by blocking ads. Technical savvy people have an armada of options at their disposal, for example we could just block JavaScript. But the average Joe relies heavily on ad blockers for a smoother and safer experience browsing the web. You can't expect non technical users to do any of the things you propose.
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