What is trademark tarnishment?
Trademark “tarnishment,” a kind of dilution, can occur if a non-owner uses the mark in connection with shoddy or unsavory products or services, illegal activity, or activity that is likely to offend the average person. For example, using a Walt Disney trademark on a website filled with pornography could be claimed to tarnish the reputation of the Disney mark in the minds of viewers who saw this material. Tarnishment is not always actionable — it might be non-commercial or parody use.