This sort of just sounds like the internet at large.
If you’re a kid, it can be scary and potentially dangerous. The game is advertised with cartoon characters and a child-friendly aesthetic, far from what you actually find in public worlds. It’s easy for bad actors to hone in on kids based on voice, then corner them and do bad things. I’ve spoken to kids who were approached and “flashed” by much older users with explicit, ejaculating sexual avatars. It’s unpleasant and disorienting. Not to mention adults who zero in on kids, drop a portal to show them a “cool world” and then get them one-on-one in essentially an unsupervised VoIP call. This platform is practically designed to trap and abuse kids.
And yes, kids technically aren’t allowed to play VRChat or even go online using the Quest per Terms of Service. Enforcement is impossible, not that anyone tries, so kids are everywhere.
Please don't let your child talk to strangers - in person, in Roblox or VRChat, in sketchy forums, etc. If you do, set boundaries for them and have the talk about danger.
If you let your kid talk to strangers, strangers will talk to them.