That is neat on getting your kids into a better online environment where development isn't purely incentivized. But surely you must know that's not the end-all of a kids user experience when being online. You're not always gonna have them on just your setup either, they will be at their friends and on foreign devices. There's unfortunately not much you can do in that instance without making a huge fuss.

Is everyone just young without kids and had free reign on the internet and got by ok so it's more relaxed to you? Were you in a situation where middle school and that age have direct communication to each other? I know teachers and other parents with horror stories of the shit that comes out. It's mostly what would be considered old school frat boy or fraternity shit but at a way earlier age, some grow out of it but I imagine others just carry on since it never effected them and then we wonder about the trolls who exist on social media lol.