There is no clear cut answer to whether someone is "real", of "fake". The whole concept of npub.world is that the user decides it, with the information presented in the page. Take this example. There are two odells, with the one in the middle being the clear impostor, that btw fooled many other (cc @ChipTuner @npub1wxxm...lej2 @royster⚡️ ) probably because they use clients that make the two profiles indistinguishible. If I had a metric that says if someone is real or fake based on followers, if you would be real, then the fake odell would be real as well, and vice versa. The information presented should be used in relative terms, meaning between the two odells, one is clearly fake.