that would only work if the USB device was fixed and never swapped out. remember the default action of Linux with USB devices is to give all devices a new name even if it is the same device just plugged in multiple times.
plug in USB device A:
system names it /dev/sdc1
plug in USB device B:
system names it /dev/sdd1
remove USB device A, then plug it back in while USB device B is still active:
system names it /dev/sde1
you are now FUBAR for automounting. just not going to happen as SAMBA, CIFS, FSTAB, autofs, etc... will all be looking for /dev/sdc1, not /dev/sde1 they are NOT the same device.