This study explores the propagation of insecure code from online forums like Stack Overflow into production code, particularly in open-source GitHub repositories. By identifying and surveying code snippets with security errors, the research reveals that many developers either mistakenly trust their own security skills or prioritize functionality over security. Some acknowledge a need for better security knowledge, while others believe ensuring security is not their responsibility. The findings highlight the need for improved practices and education to address the propagation of insecure code.