I'm probably just paranoid, but I have a teenage son in the house and I know I was seeking out XXX when I was his age. LOL
I only have Emby installed on my Fire TV in the bedroom, but the NAS still shows up on his smart TV and I was able to access my XXX stash without much effort.
I'm encrypting the folder right now as I type this. Can I still use Emby to access an encrypted folder?
I don't think so, but if the NAS is showing up that might be due to DNLA and if you turn that off that might stop the TV from seeing it.