Hacker News Reader

By publishing on the public web?

It doesn't. Safari auto-detects when to offer Reader mode, and what's new in Safari 11 is you can then configure the website to automatically start in Reader (you can do this through Safari preferences, or by right-clicking on the URL bar).

cmd+opt+i, select the ad element, delete it. What the website considers "OK" is never a factor as to whether your browser can block an ad.