[dec0dedab0de]

we used to mess with our friends by making AIM screen names that looked identical, or super close to then. then messaging other friends in the group. Or going into chat and saying things like "im a big dumb idiot"

This was like 1998-2003, and non technical people were doing it too. I think I am the only one from that friend group who would even consider that as something to watch out for.