7/10, 2 of them i would've guessed right but i changed my mind.
it's easy to tell them apart because
a) programmers look like hobos
b) INTERNATIONALLY FAMOUS CORPORATE programmers look like CEOs in suits
c)serial killers are usually from the beginning of the century and the pictures are therefore black and white
d) serial killers look like either ordinary people or creepy dudes who masturbate in your back yard
i also learned that pedophiles always have creepy smiles.