They're just popular ETFs which contain a lot of $AAPL. I was just commenting that even if someone doesn't explicitly hold any $AAPL, if they own ETFs/mutual funds, they are likely exposed to $AAPL.
Doesn't apply to you though since you said you don't own any stock :)
I think (?) it's generally true that the root user should never mess with users' files.
Imagine your home directory is shared across many systems on a network (my alma mater did this). It would be really bad if a sysadmin for alpha.university.edu removed a program, and suddenly your personal settings were removed from beta.university.edu
even though that computer still has the program.
This is one of the "UNIX on the desktop" issues
a lot is designed for a sysadmin/multiuser situation, and it has some gotchas when using it as a desktop machine (I'm used to/really appreciate the directory structure and settings management at this point, but it may take some getting used to).