I knew what it meant but I still find it irritating when people are lazy about less than universally understood acronyms.

It excludes people from the discussion. HN is a broad church and we shouldn't assume too much domain knowledge beyond the obvious commonalities.

I have edited my post so that it includes "Do Not Track" instead of DNT in the first paragraph. Hope that will stop others from having to look it up.

Presumably, it's also more specifically about the HTTP header for it: https://en.wikipedia.org/wiki/Do_Not_Track