There's no human in the process (to be trawling through Facebook pages looking for videos where relatives speak) prior to the victim picking up - and even then

There's no human in the process (to be trawling through Facebook pages looking for videos where relatives speak) prior to the victim picking up - and even then often not until the victim has replied to some initial hook. The huge number of phones being automatically rang doesn't permit it, as far as I can tell.