I don't think you have to worry about fake discs on xbox 360 ps3 and above those consoles are not worth the effort to fake for lol.
backup copies of them olden days exist but they where not meant to fool people. the packaging alone would be an easy giveaway, you don't even have to look at the disc.
still GG's trying to get disc art on a copied game it's to much effort you don't even have to look for smaller details.
It's kinda overkill to worry about fake discs on these newer consoles.
Just look at the top of the disc if it doesn't have disc art it's a fake lol.
The only games that potentiall have nice repro discs are really old mega cd games like snatcher to name some example.
Since eventually all real games will break or become unusable, what happens if we want to preserve disc games for the future?
Pretty much all games for notable consoles are already backed up on emulation sites ready to play.
and probably at least a couple hundred if not 1000's of folks that have hardrives of full console sets.
Normal libraries are already preserved with the exception of super rare shovelware that pretty much no one cares about.