"Don't Mess with Texas" is a public service campaign launched in 1986 to reduce littering on Texas roadways. The slogan encourages residents and visitors to take pride in the state's natural beauty and keep it clean. It has become a cultural icon, representing Texas pride and environmental responsibility. The campaign features various advertisements, including television spots and billboards, that emphasize the importance of proper waste disposal. It has garnered support from local communities, schools, and organizations, making it a collaborative effort to promote a cleaner environment across the state of Texas.