Can't say I'm a fan of the whole "blacking out the website because someone's running adblock" though. Adblock is how modern browsers work because it turns out the internet couldn't be trusted to responsibly run them. Blacking out a site until someone turns them off is a literal dark pattern.
If a site is ad-supported, they should be free to apply any policy they want to control potential revenue loss due to adblockers. 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?
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?