I would say if the human driver was distracted and drove past a stop sign, he did not "ignore" the stop sign. He simply "missed" or did not see the stop sign.
To ignore something, you have to be aware of what you are actively ignoring. Even in the link you provided for the "second" definition, look at the examples paired with it.
Because not all content creators pad their videos. They often provide links to documentation. You can easily skip through the video and you have the option to watch them on 2x speed which is what I often do.
IDK, I would argue it is better than your average driver in a lot of cases. Not just "drunk teenagers." On my daily commute I constantly see people on their phone while driving, eating, probably too tired, etc. A couple times it has even reacted faster then I probably could and saved me when other drivers suddenly veer off.
Are you talking about on the highway or roads with stoplights. Normally, I rarely have issues when using Auto Pilot on the highway. On all other roads though, it definitely isn't worth it.
https://youtu.be/jfdQ_3iq4B8?si=9vjdM1cz5FzxuJ40&t=575