As machine learning and artificial intelligence continue to grow in conversation-based applications, a trend is emerging where more business logic or rules are being pushed into the client side for applications, known as Thick Clients. This shift is a departure from older design patterns like Model-View-Controller (MVC) or Microservice architectures, which dominated implementations for decades and led to Thin Clients becoming the standard for applications. Thick clients have several security implications, including improper access control, insecure storage, variable and response manipulation, and reverse engineering. These vulnerabilities can be exploited by hackers to gain unauthorized access to sensitive data or perform unauthorized actions, potentially leading to catastrophic consequences such as lawsuits and financial losses. The author emphasizes the importance of proper threat analysis on projects or applications using Thick Clients and encourages developers to consider pushing security-related logic onto backend servers to limit their security footprint.