Examples:

• For decades, smoking has been considered public enemy number one in the fight against cancer.
• Plastic pollution has become public enemy number one for marine life conservationists.
• During the 1930s, the notorious gangster Al Capone was labeled public enemy number one by the FBI.
• In some countries, corruption is viewed as public enemy number one, undermining trust in government institutions.
• Obesity is often referred to as public enemy number one due to its association with numerous chronic diseases.
• Cybercrime has emerged as public enemy number one for businesses and governments alike.
• Inflation has become public enemy number one for central banks trying to stabilize the economy.
• Fake news has been dubbed public enemy number one in the battle to maintain an informed public.
• During the prohibition era, bootleggers were often seen as public enemy number one by law enforcement agencies.
• In recent years, terrorism has been identified as public enemy number one by many nations around the world.
• That terrorist is considered public enemy number one.