You go on a rant about morals then want to impose your own on him?
He is not cool with his kids seeing that. I can see that. As kids talk to each other as they are humans. You do not want your kid to be 'the one who has the porn games on their tv'.
Like it or not you would end up getting your kid ostracized by the neighbor families. It is something people have to deal with. People are sensitive about it. Especially with their kids. You are looking at it from your pov look at it from the parent across the streets pov. They now have to take care of something they personally may not be prepared for. While that may not be your problem it is rather rude. They will treat you accordingly. You could get lucky and have 'cool' neighbors. I know mine would probably not be cool with it.