[3np]

A 6yo can not meaningfully give informed consent to ToSs or privacy polies of YouTube and Roblox so even supervised is ethically problematic depending on how it's done. Unsupervised is obviously not safe and I do not see anyone here arguing that.

[conductr]

I don't think that argument needs to be made here, I mentioned it because it's something I observe daily in the real world. I talk to parents who let their kids use these things, I inquire about their reasons for doing so and their level of oversight. It's something I've personally taken an interest in as a parent myself who has a no tolerance policy towards it; I like to know other people's justifications for allowing it. Many of them do not supervise the use BTW. Even people I consider great parents otherwise, they may setup some parental control stuff initially but then the kid is off with their device in another room.

When it comes to privacy policies and ToS, I think a 6yo is reading into it just as much as their parent does. And by that I mean just looking for the [Agree] button.