Dangerous Products Warning Act - Amends the federal criminal code to impose a fine and/or prison term of up to 5 years on any business entity or product supervisor with respect to a product or business practice who knows of a serious danger associated with such product or business practice and knowingly fails within 15 days after discovering such danger to inform an appropriate federal agency in writing, warn affected employees in writing, and inform other affected individuals. Imposes a fine and/or prison term of up to 1 year on any individual who intentionally discriminates against an employee who informs a federal agency or warns employees of a serious danger associated with a product or business practice.