I just realized that my first paid computer job was when I was maybe 15 and a random dude on the Internet hired me to write "security software that would persistently monitor and record keystrokes of his office employees and send a backup of the recordings out once a day as a hidden email in the background".

I was super excited about getting paid for writing software and let's say I was still morally very flexible and lacked any ethical foundation for my work. Typical "I was young and I needed the money" situation but it's scary to realize that bad people would hire literal teenagers to write malware for them.