After you're web-savvy, you gain an abililty to know what cyber-people you encounter are all about. At this urban legends site*, Illudium Phosdex obviously looks like Dennis the Menace's dad, and eats Cap'n Crunch and watches cartoons all day.
"loserboy" at the gil thorp site clearly is a Star Trek geek who rides a hippity-hop, has one eye larger than the other, and drools, baby, DROOLS.
If you look up "box" in user names on AOL, you learn that "box" is often a euphemism for...well, anyway. "BoxJam," anyone can plainly see, must be some kind of major stud.