A car dealership deployed a chatbot to answer customer questions. Within hours, someone convinced it to agree to sell a car for one dollar, and the conversation went viral. A customer service bot was manipulated into insulting the company it represented. An AI coding assistant generated working code that contained a critical security vulnerability. These aren't hypothetical scenarios, they all happened because the systems lacked proper guardrails. AI models are designed to be helpful and will follow instructions, including cleverly disguised malicious ones. Without input validation, output filtering, and behavioral boundaries, any AI system deployed to real users is a liability waiting to happen.