Both. It's a technical failure that the system is running red lights, and a cultural failure for it to be pushed out to production.

Interesting to consider it might be cultural. If Tesla is using training data from their other cars, maybe this is something the car has just figured out that human drivers do?

They already allow the cruise control's automatic speed limit adjustment to have an offset applied, so that everywhere you go you're speeding by 10% or 15% over the legal limit.

On the low-speed roads mentioned in the article, people ignore unoccupied stop signs and red lights all the time. It was literally 6 days ago that I was biking home from work, stopped at a stop sign (I know some cyclists campaign for Idaho Stops, but they're not legal in my state yet and I'm out there as much for advocacy as I am for anything else), when someone blew through the 35mph 4-way stop without even putting their phone down. There were no cars, just me on my bike, so I guess she felt she didn't have to stop?