Running an adblocker is literally a "free rider" strategy. I've been online since the 90s and have never felt the need to do it. I probably have a high tolerance for unwanted ads, but that's the luck of the draw. What entitles you to run one?
I mean, you're sending _me_ the bytes. I get to decide what I do with them.
I don't tend to complain when people stop serving content when I'm using an ad-blocker, but I do reserve the right to do whatever I want with the bytes you've already sent.
Quite apart from that, connecting to their site does not obligate me to display everything they try to send in exactly the way they want me to see it. My web client can display things however I want it to. Because it's mine. And I tell it what to do. They're entitled to control what they send me.
They're not entitled to control how my client displays that.
Operating a client which can choose how to display the content it receives. That's the entire point of a distributed network operated on standards and heterogeneous clients and servers, rather than a monolithic purpose-built application.
Trauma from GIF and <blink> tags from the 90s. Resulted in low tolerance to ads and a strong aversion to taking the risk to disable adblockers.
Someone paying $20 for an ad trying to sell me a product, will be happy that their ad is not served to me -I am not going to buy their product in the first place, their money is better spent advertizing to people who might buy it.
Me looking at an ad does not help sell any products.
And if you don't like that, and you don't want visitors but customers, stick your content behind a login. What data you serve is up and how you do that is to you, you fully control that, but what happens once that data is on a user's computer is up to them. Because now it's in their house, not yours, and they get to decide what to do with it, not you.
If a site can't exist without ads, you have some thinking to do as site owner, but you don't get to yell about how I parse and render the data you send without charging for it. Ads are not "part of the deal", they just something you slapped on in the hopes that someone else's obtrusive content makes you some money, by the grace of that someone else. No deal, kid.
That's the wrong question. If you have a webserver openly transmitting html to anyone that connects then what entities YOU to dictate how that is interpreted? The answer is nothing. I have the content and I'm not required lawfully, or even imo morally, to also execute any accompanying JavaScript, regardless of what it does.
That aside, what one does with information they've been handed is up to them. When you're in a crowded room, do you feel its entitled to tune out all the noise to only hear the conversation you're interested in?