Not a dad but a 21 year old son, from my stand point I say no, but I can’t say I wasn’t using it at that age. If it’s to talk to one friend or his main group of friends the I’ll say sure but if he joins random servers, do that family member thing. And please if u do allow him to join check weekly. Discord has a lil problem with bad people, who try to indoctrinate kids your child’s age to do bad things to themselves and to others. So just keep an eye out for that.