We've had the capability to pick and choose what we want to download from a website since the first web browsers. Why are ads any different? It's the same as if I decide to strip out all HTML frame and table tags just for shits and giggles. Would you call that piracy?
It's my device, and I decide what to accept from the website. If they want to block me completely, they can do that too. But they don't. Not yet.
I also have no stomach for downloading 10 megabytes worth of ads and trackers for a website where the actual content is like, 300 kilobytes. THAT is complete bullshit.