You're right about the dangers that kids could be talking to..
You never know who could be behind the screen.
Even though someone may say they're a child, doesn't mean they actually are one.
I think there should be some sort of message when you join the game.
For example:
'No Giving Out Personal Information! Address, Number, Age, Ect...
Stay Safe And Have Fun!
'
Or... Maybe @vertx could block text?
If there's an inappropriate word detected, there should be something that prevents the person from sending the message.