The book “World War Z” actually has a good chapter on this. A rich guy sets up a fortified house, it was already really secure, invites his friends and staff, expects to wait out the end of the world.
He would have, if he hadn’t been televising his behavior and his friends tweeting / reporting their reactions.
No opsec, so the barriers come crashing down as people with ladders and tools and families come pouring in out of the hope of safety.
Reminds me of an old TWILIGHT ZONE episode about a fallout shelter.
In the movie DEEP IMPACT, the government designates certain people to be saved in underground shelters. Outside many people are rattling the fence because they are excluded.
Ever wonder what would have happened in the REAL WORLD, with all those Bible and gun toting people left out?