There's no fixing this. *

Just remember, you're not the Captain of the Titanic, it's not 1912, we're not even remotely a military organization.

You don't have to go down with the ship waiting for someone to get their bag out of the overhead with an airplane that's on fire.

(*There's a good book called "The Unthinkable: Who Survives When Disaster Strikes, and Why" that came out in 2008 that goes into the individual and herd psychology of why people behave the way they do in unfamiliar yet life threatening situations. Airlines base their FA evacuation procedures based on this stuff...yelling at passengers, even swearing, repeating the same consistent message (leave everything), but you can only do so much with people who's current circumstances don't align with any of their decades long mental model of how to perceive the world.)