It’s not a hack. It’s known, expected behavior of the program. Adobe has a specific feature to redact. Color filled boxes is not it.

A dictionary definition: "use a computer to gain unauthorized access to data in a system."

This isn't about knowledge or expectations. They didn't use colored boxes to jazz up the presentation, they _intended_ to prevent you from reading it, and now you can, with this, again incredibly _lame_ almost meaningless even-my-five-year-old-could-do this "hack."