Because when you have multiple OSs accessing the same shared folder, they all create their own crap, which is then visible to the other OSs, and fills up directories with stuff that confuses normal users.

I don't run multiple OSes, but I do use USB sticks and SD cards on other people's computers and vice versa. I'm pretty sure that is "normal user" behaviour.

It gets annoying real quickly because you see the "crap" files of all the OSes you're not using. And you delete them, you only have to insert the stick and they're back. This happens in different ways for all of Mac, Windows, Android and certain Linuxes.

Some users however access our file shares from their Macs, or their Windows PCs, or even some from their Linux machines. That's fairly normal.

A daemon with a CLI and a programmatic interface, backed by a SQLite store, hooked into Linux audit and perhaps an LD_PRELOAD?

For me, mostly exclude them from select all, or perhaps scroll past them to see meaningful files.