Help me with privacy for 10year old on Xbox live

QUESTION: My 10 year old keeps chatting and friending strangers via Xbox Live and headset. He tells me that he can't play Overwatch and some other online games if he isn't in group chat. Is this true? How do I protect him further? Besides taking it all away!!???

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Help with privacy and online safety settings

I have a problem with the privacy and online safety settings for Minecraft Xbox live please help me figure it out!

 

Privacy and Security settings

Hi, I recently bought a new slim 250G XBOX and downloaded my old gamertag and had a merry old time however, when I click on Privacy and Security on the dashboard tab it just opens to a load screen with the two circles for an indefinite amount of time.It
still allows me to backout of the screen using "B" or the XBOX button on the controller but wont open the screens.It also occurs when I try to REDEEM CODES or SUBMIT A PLAYER REVIEW whilst on LIVE but it isn't a LIVE issue as it won't allow me into Security
or Privacy whilst offline. I can access it through the XBOX controller button but it doesn't load there either just a white screen with the circles.

Any ideas? The XBOX isn't even a month old and I traded my PS3 in because it had loading issues now I cant even play HALO 4 with my mates due to me not having access to my privacy settings and in turn my NAT.