I'm hoping to block the Playstation Store to prevent unnecessary spending and browsing for some users on my PS4. In researching how to do this, it involves setting up Family Management and establishing a Family Manager and any Parent/Guardian accounts. Playstation also considers a child account based on age.
The Family Manager account with the original PS Plus subscription needs to be demoted to a child account, I'm having trouble finding a way to do that. The instructions here or here would have been fine... had I known I needed to set this up immediately when I setup my PS4 and accounts. Now I have multiple accounts that have save data tied to them, and I don't want to delete save data or trophies for those accounts. I've also read on Arqade that I can't move the save data to a brand new, properly setup account.
I've tried researching how to do this at the router level, by somehow blocking the Playstation Store's IP or ports. I'm not sure if this is doable without totally blocking all the PS4's online capabilities (i.e. online gaming and Netflix).
Is there any way for me to restrict Playstation Store access without deleting any of my accounts?