I was the first kid in my school who was allowed to play World of Warcraft, at 11, so my answer is probably "not me". I kind of treated it like a single-player game though and only occasionally talked to others. I thought the idea of every other orc aroudn me was a human being behind their own screen was really cool though, still kinda do even.
A few years later everyone was playing Counter-Strike, Diablo 2 and Warcraft 3, and I joined them.
My parents were stricter with the age ratings on games than if they had online multiplayer, but back in 2006, right on the cusp of the dawn of social media, I don't think many parents (or kids) really knew of the risks of being online. I feel that it's pretty different now compared to then, because stuff like doxxing wasn't a common occurence, as Online and IRL were more seen as two separate worlds.