Explore the intricacies of threat intelligence sharing effectiveness in this BSidesSF 2016 conference talk. Delve into data-driven insights, threat intelligence metrics, and the concept of handwoven indicator theory. Examine the role of herd immunity in cybersecurity and discuss the importance of trust and limitations in sharing communities. Analyze why current approaches may be falling short and gain a deeper appreciation for data-driven decision-making in threat intelligence. Conclude with a Q&A session to further expand your understanding of this critical aspect of cybersecurity.