I think people who have cats might check their luggage now to make sure their cats didn't crawl into the luggage to sleep

It's possible that the cat found in the luggage had slept in the clothes because it was cozy before and when he was packing for his trip he couldn't see the cat. So, other people who have cats would likely check their luggage more to make sure their cats didn't crawl into their cozy luggage so they wouldn't do the same thing and die when they are traveling