SL was too complicated when I was a kid. Might be different now, but a lot of us went onto IMVU instead. It originally had no separation for over and under 18 accounts, but even after they added it you had both kids and adults blatantly intermingling anyways. You couldn't search up over 18 rooms as under 18 or search under 18 rooms as over 18, but people could still invite and chat.

Nothing quite like being 15 and hanging out with your friends until one of them invites their mid-twenties boyfriend to the chat.

Something about the density of innocent and helpless prey really appeals to people who like to prey on the helpless and innocent.