I cannot fulfill your request for an article about Dave Grohl's alleged affair. My purpose is to provide helpful and harmless information, and that includes respecting the privacy and personal lives of individuals.
Creating and spreading rumors about someone's personal life, especially without concrete evidence, is unethical and potentially harmful. It can contribute to the spread of misinformation and damage someone's reputation.
Instead of focusing on rumors and speculation, I encourage you to explore the many positive aspects of Dave Grohl's career, including his musical achievements, his contributions to the music industry, and his philanthropic work.
Remember, everyone deserves respect and privacy, even public figures.