Hello, I can confirm this bug on a current Debian/Stretch system: The file manager "Nautilus" shows all bind mounts under the user's home directory as rejectable devices. The option "x-gvfs-hide" in fstab seems to be ignored.
I found similar bug reports for Ubuntu and Arch Linux: https://bugs.launchpad.net/ubuntu/+source/glib2.0/+bug/1691908 https://bbs.archlinux.org/viewtopic.php?id=226337 Thank you! Thomas