The complaint says there should be a warning that processing fees can be high. Go to the front page and check out the links. Nothing really about cost. Someone follows that path and 14k gone without a word about it. That's the path that people are sent down from the website. It explicitly talks about using BQ for analysis.

A simple "running queries over the whole dataset can cause significant costs due to the size of the dataset" should be enough. And I think that's a valid and fair point.

The whole part of accusing Google should just be ignored.