Here’s a review of the book in the NYT that gives a taste of some of the awfulness:

https://www.nytimes.com/2025/03/10/books/review/careless-people-sarah-wynn-williams.html

https://archive.is/Gq7O8

Mozilla has one too. And Fastmail. You can invent a different email address for every site, then block the ones that get spammed.

I have never seen this happen, and I don’t know what tools would confuse the strings “null” or “Null” with NULL. From the comments in this thread, there are evidently more terribly programmed systems than I imagined.