Mallory Mooney and Justin Massey discuss the importance of protecting applications from abuse of functionality, highlighting key tactics used by adversaries to exploit vulnerabilities in authentication controls, inventory management, payment services, and customer rewards programs. To identify signs of application abuse and fraud, it's essential to monitor logs, filter out noise, and ask questions about your application, such as exposing information that could be harvested or targeting specific users. Datadog can help proactively monitor abuse of functionality by collecting logs, providing threat intelligence, and offering full visibility into application activity. To mitigate these threats, consider implementing measures like two-factor authentication, rate limiting, web application firewalls, and least privilege policies for internal services. By leveraging Datadog's security offerings, you can gain greater confidence in identifying risks to your applications and take proactive steps to secure them.