The flaws in the robberies are...
You get an instant wanted level when you point the gun at the clerk. Why? Unless the clerk calls the cops, another NPC is close by and witnesses it or you shoot your gun you shouldn't get anything.
You only drop 1 star when taking off your mask or switching disquises. Makes no sense. Once my mask is off how he hell do they know its me? Nobody saw my face.
Killing the clerk with a silenced gun still gives me a wanted level.