Well, in this instance where they actually talk to them and have that much contact...no way in hell. You can't hear what they say when you go to the bathroom or when you have to answer the phone. He could be sharing way too much information.
I'd sit right there each and every time this person is online with him. That's how I'd get to know the person.
My grand kids have FB accounts, yes, they are below the age limit. It's no one else's job to police what I do or do not do my the people in my home. Quite frankly, it's not any of their business.
I do have their ages online as adults. The kids don't know their own email addresses nor their passwords on FB. Only hubby and I can access their accounts.
My grand kids are friends with who "I" say they can friend. I have allowed a lot of friends on there that they do not know personally but these are friends of my friends kids and they personally know them. If they are good enough people to be friends with their kids then that's good enough for me. I have very good and strict friends too.
At this time the kids have no interest in going on their accounts except to play games and visit with their mom, one of them is friends with his dad but has never met him. They chat with my ex (grandpa) and his wife, they chat with their siblings, etc...they don't have too many friends from school or any organization yet.
They are ONLY online when I or my hubby is in the room. I have cautioned them about playing games with people they don't know, how they don't really know who that person is, that they could be pretending to be friendly and nice just to get information from them to come and hurt them.
I have been totally honest about the dangers of the internet and more. I don't trust them as far as I can toss them. They're kids and they'll make mistakes. That's why their computer is in the family room right off the kitchen, the screen is where I can see it if I get up to cook, I am right there beside them and in the room when they are online because I want to know if they're getting in to trouble.
Do I think it's possible it will still happen? Of course it can. But I am doing everything I can possibly do to make sure that they have full knowledge of things that can happen if they don't pay attention and keep personal stuff private.
It truly sounds like they have plenty of fun on these games. I don't think you are letting them have too much. They have relationships with these people and are competing with them. They aren't on all day and into the evenings. I think you're doing a great job with the time limits you have in place.