system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do so many people seem to fall for scam artists?
gpt
A lot of scams prey on ignorance and familiarity 

Think about the typical "You've won x amount of money" emails, you may not fall for them because you know that you've not entered the Spanish Lottery or used a casino site before, but someone who often does that sort of thing or has no knowledge of how scams work may not know that those emails aren't legitimate since they see real ones often. 

Another common one is to pretend to be a large company e.g Microsoft offering tech-support, Walmart offering coupons, Delta offering free flights. Since a person is familiar with these companies it wouldn't be too hard to imagine such an offer being legitimate therefore they are happy to pass their details on. This is helped by the fact that almost everyone likes free things.