Why worry if it's childish or not? If it gets you peace and quiet in your home, go for it!

Generally speaking as CODs these days are not taught any life skills by their "parents" so don't pin your hopes on that.  Some NEVER launch. 

Shut the internet off to his device and if dadddeeeeee doesn't like it,  bye bye.

Well, it might make you feel better for a couple days, but it won't solve the issue of your husband's lack of parenting long-term. 

Go for it. But expect that at some point his father will figure it out and give you grief for it. I'm sure you want quiet for your own sake, but frankly, I wouldn't waste the internet-free times on when his father is sleeping, nor would I worry about keeping SS quiet during those times. Let him wake his father up with his loudness and maybe it'll occur to daddy that he needs to parent his kid better. The prospect of 9 more years with an unparented brat, a troublesome BM and the shitty parent who has exposed you to them would probably have me exploring my other options, though.  Turning off the internet can only accomplish so much. 

Either he parents the kid or you do.  Put it all back on dad. He should be ashamed that this has affected you to level of turning off the internet.   "If you don't like the way I handle things DH, then you make sure I don't have to in the first place."   

I think the kids need some type of credit card on the account...I'd start with removing that first. 

When I raised my son, he's 26 now and in the Air Force, his gaming time had to be earned. Example: No gaming during the week and IF and ONLY IF by Thursday end of school day, all of his grades were acceptable and he passed quizzes/tests and turned in ALL of his assignments that week, then he would have earned ONE hour of gaming on Thursday after homework, chores, and dinner. The weekends were flexible because I parented him....CrossFit on Saturday mornings, car to dealer for wash, Costco and other grocery shopping, I taught him to fill gas in my car, check tire pressure, check & fill oil and windshield fluid in my car, attended a local charity event or explored the art district in downtown Dallas, etc. On Saturday evenings, he could invite his friend over, if the boy was not already with us as his parents were living their new lives, we would go bowling, arcade, mini golf or batting cages, they could game after dinner. Sundays, breakfast, they put dishes in washer, empty trash, wipe down countertops & sink, clean the bathroom they used, bathe adn walk the dogs, go to matinee at the movies, clean up the yard, trim bushes or trees, rake, assemble shelves, anything outdoors that teach my son and his friend LIFE SKILLS, grill and cook dinner. It's amazing how all of these things have served my son since he's been out on his own and he tells me how surprised he is in 'how can people my age not know how to use a washer and dryer or a vacuum?' His dad lived 10 minutes from our home and was too busy living his new life with a bitch that didn't want our son around. I chose to not remarry while I was raising my son, pursuing my sucessful career and keeping PEACE and balance in our lives. I dated on the weekends when my son was with his dad. But this is what worked for me, as an independent woman who took pride in raising my kiddo and teaching and nurturing him to live an honest life with integrity. Seems most men want to remarry and have the new wife become the mommy while the man continues to avoid parenting. Poor kids get lost in the shuffle, almost displaced, like my son's friend, who I jokingly called my 'second son.' 

If at ANY time my son got anxious about getting back to the addiction/gaming, I would look at him and sternly say 'Stop it! I know what you're doing, so just stop.' He never got sucked into social media, playing games on apps on the phone...XBox the military type games. He was allowed to start gaming as a teenager. 

Too many parents are NOT parenting and letting the video games be the babysitter, only without the guilt like we had back in the '90s from our kids watching VHS of The Lion King, Toy Story and Land Before Time cartoon dinosaur shows. 

Kids thrive on a schedule and structure up through high school and they need to be parented. I agree with above posters, put it on dad, who cares if dad wakes up from the noise? Leave the house and do something for yourself. It gets worse when the boy has his hormones kick in (very soon!) and you'll wish you bailed out now. When you shut off the internet, the boy will find ways to get on his Fortnite game. I've had interventions with clients with kids that work their way around getting access to their drug (Fortnite). 

BTW....has dad sat with his son to actually SEE and HEAR what goes on with Fortnite? I believe it's rated Teen which is not suitable even for a child this young. 

I hope you can get some peace and resolve without WWIII breaking out with your hubby.

But that would probably require DH to do so.  Maybe if you let him scream really loudly during DH's nap he'll be motivated to do so?

Otherwise I probably wouldn't turn the internet off completely, that seems passive aggressive and that rarely works out well.

You and DH should get on a plan to have SS 'earn' his Xbox time - but again that would require DH to be on board with actual parenting...

Been there DONE it! SD10 used to scream and literally hit the iPad when playing Roblox. I'd ask her so many times to keep it down, explain that online people can't hear her, etc. Also tried to explain that she was going to break the d@mn thing if she kept hitting it out of frustration. 

I turned off the internet to the iPad and didn't think twice. She would go "UGH" then storm off elsewhere in the house. 

Do it.