Ugh I hated multidisk installs. Especially when you/your brother is too lazy to put away one you just used, the dog scares the cat, who jumps onto the desk and scrapes disk 4 of Baldur's Gate. Impossible to use now.... Ruined a 6 disk set.
Solution: don't own beasts. Life becomes
considerably easier (not to mention cleaner!).
Then there's the crazy idea of putting the disk back in the case it belongs to. My brothers never did this, so opening BG has a Sim City disk. Sim City has a Sesame Street disk, Sesame Street has an AOL install.... I spent more time putting disks back in their dang sleeves/cases than actually installing games.
I agree that people who are unable or unwilling to exercise a modicum of attentiveness can easily result in scratched discs.