The program parameter is for detecting PUPs or Potentially Unwanted Programs. These are most likely unwanted but not a virus.
I tried using the ADL (All Drives Local) and got the scanner to scan local hard drives. I did not have any network drives to test to see if it scanned those by default.
The --ADN (All Drives Networked) worked for me by not scanning any local hard drives. By default registry and memory are still scanned so some disk activity will still happen.
How can you tell if Stinger is not scanning for rootkits?