Would it be simplier if this mode just tempoarily changed all config/gamelist files etc to read only, so any changes made wouldn’t be saved? I can’t see it being possible to disable the scraper without re-coding Emulationstation.
I think the word you are looking for is parental, unless you want to restrict this new functionality to dads only 😉
As it stands I am currently working on an implementation of exactly this in ES. If you are interested to be an early beta tester, let me know.