Using ad blockers is unethical. No one who uses one (probably 99% of people on HN) wants to hear this, but the conclusion is inescapable really.
You may commence your downvoting.
ETA: Why do I claim it's unethical? Every ad-supported page is an implicit contract: If you want the good stuff on this page, you need to pay for that by giving some of your attention to <these shitty ads that we all probably hate>. Nothing more. If the trade-off isn't worth it to you, that's fine: you have the right, and the ability, to reject it -- to cease interacting with the site at all. OTOH, using an ad blocker to access the site without "paying" (with your attention) is violating the contract in the same way that hacking a parking meter downtown to park your car for free is. Running websites isn't free, and even if it was, it's the site owner's prerogative whether and how much ad-attention to "charge". If the fundamental idea of capitalism is sound (and perhaps it isn't -- but then let's discuss that), exorbitant ad burdens attached to desirable content will eventually be outcompeted by other sites offering similar content for free with fewer ads, or for actual cash.
There's a more self-serving argument, too: If everyone used 100% effective ad blockers, Alphabet (minus GCP) and Meta would not exist, and nor would the very large number of free-as-in-beer services that make up a large part of what makes the internet useful to people. Using ad blockers is only "sustainable" in the same way that mafia protection rackets are "sustainable" -- by being a sufficiently small drain on the rest of society.