Parental controls I actually want

What a I really wants from parental controls is to be able to lock the settings and editing of save data. Seriously, giving me the ability to lock my kids from creating new saves or altering old ones, from selecting profiles of other people, or going in and playing with data management and other options is what we need. I can easily make sure they aren’t playing Doom on my own.

Also where the hell is it possible to give feedback to Nintendo? I see so many companies desperate for people opinions but you cant seem to get ahold of Nintendo anywhere besides bothering tech support