Every single one of those guys (ok maybe not Joel) could tell that this was an unsafe thing to do, even the guy with the Safety Hat. Hopefully someone not at the bottom of the ladder (literally) gets in some shit for this.
Joel got PTSD from this accident. And it appears the County of Santa Clara is investigating the construction company, who, as it turns out, didn't file an OSHA accident report for this.
This is frustrating assuming this is a result of some prevalent attitude that suppresses reasonable safety precautions. People die because if this kind of ingrained idiocy, it's garbage.