Uncommon Sense.
Never a truer word spoken than your quote:
Let he without sin cast the first stone
I too have been guilty of the very same crime that these other aviators have been accused of.
Fortunately no, it was not serious but it really got me thinking and determined that it wouldn't happen again.
Sure it happened on a short(er) sector and what I did learn was that although I always go through all the NOTAMS on a longer sector, I would more thoroughly peruse all of the NOTAMS personally on shorter sectors pre flight.
To make matters worse I was performing training on a command candidate and missed the NOTAM entirely myself.
I was to personally blame and set a poor example for my trainee who didnt have to buy a meal or drink for the remainder of the trip.
Time pressures, monotonous reams of never-ending NOTAMS, distractions and it can happen to anyone.
It called Human Error and none of us are immune.