What in the world does filing bankruptcy have to do with flying on an airplane? I thought being on 'do not fly' lists came about because of one doing something

What in the world does filing bankruptcy have to do with flying on an airplane? I thought being on 'do not fly' lists came about because of one doing something that could be construed as anti-security, er...like terroristic in nature. I'm so confused with how some people commenting in these threads come up with off the wall, random and unrelated associations lol. It's exasperating to say the least.