Unfortunately there are several examples of current practice that would fall into this category, yet airlines and regulators appear willing to wait until an accident to change their position.

Off the top of my head - gate to gate IFE (issues with passengers not hearing instant crew commands in the event of an unplanned emergency, and tangled head-sets in the event of an evacuation), 20kg+ cabin bags, high density seating (pitch, width of aisles, number of rows), allowing airlines to have more than 7 rows between some passengers and an exit (which IIRC is potentially outside the reasonable 'survival window' in the actual event of thick smoke and/or fire).

Again, I'm starting to think that mixed messaging around safety is part of the problem. If everything is labelled as a 'safety issue' even when it's not, or some safety issues appear to be overlooked in the interests of commercial considerations, it probably leads to some passengers making their own determination about what they think is and isn't important (rather than accepting everything is important).