Reminds me of a sci-fi story I read. A detective (wait was this in Do Androids Dream of Electric Sheep?, maybe? I don't remember, anyway) is looking for a person and asking around. I stead of carrying around a picture of the person they are looking for, they compare the person's features to a list of celebrities and just go around asking if anyone has seen someone that looks like that celebrity. Point being lots of people have surprisingly similar features and there really are "doppelgangers" out there.
But just try explaining that to some stranger that just caught you staring off into space directly at their face because they look like a person you had a crush on in college, only you're an old fart now and they don't look like that old crush would look now, but like the memory you have of them. "You look like someone I know" always sounds like a pickup line.
It's amusing to me that the very idea of leaving the house without your cellphone is seen as very dangerous. But I guess payphones and landlines at every tiny shred of civilization aren't really a thing anymore. Nobody could track me and I could get genuinely stranded occasionally for the first few decades on my life, but I never felt that lifestyle was dangerous. Just raw dogging life before it was cool I guess.