>>11231935if everyone in his age group is into Roblox, talk to some of the other parents. It will be a good way for you to meet and interact with some of them, if you haven't already, and mention the concerns you have, and maybe organize a play date where your kid and some of the other kids can play together at one of the parents home so one or even two of you (call it an adult playdate) can supervise.
I agree with everyone who says you should monitor their on-line activities, when they are older and will resent things like this you can explain better to them why you do it and what they risks are, especially if they are seeing you do stuff like that and it's clear it's in their interests and to their benefit, NOT yours and that other parents are treating their children the same.
This means they will grow up with this knowledge, instead of growing up wild and finding out when they are 10 or 12 or 14 that you want to put limits on them.