If they are an administrator, Zoom will delete the ugin from /Library if it's there, but it still installs to ~/Library.
If the user opening the package isn't an administrator, it looks like it will install the app in the user's home folder instead. The script appears to install two items, namely: /Applications/.app That's bonkers, and also means that the system won't have a list of the files it installed, because it's doing it using shell script.
Rather than actually using the installer to install things, it does everything in the preinstall script. The Zoom install package for macOS is mad.
