Title: Harvesting the Low-hanging Fruits: Defending Against Automated Large-Scale Cyber-Intrusions by Focusing on the Vulnerable Population* Abstract: The orthodox paradigm to defend against automated social-engineering attacks in large-scale socio-technical systems is reactive and victim-agnostic. Defences generally focus on identifying the attacks/attackers (e.g., phishing emails, social-bot infiltration, malware offered for [...]