Here are some cases of celebrities or politicians who have had ad hoc non-professional security guards for various reasons:

Celebrities:

1. Michael Jackson: Had a group of volunteer security guards, including a former Marine and a martial arts expert, who were not professionally trained.
2. Britney Spears: Had a friend, Fernando Flores, who was a former police officer, serve as her personal security guard.
3. Paris Hilton: Has used friends and acquaintances as security guards on occasion.
4. Lindsay Lohan: Has had friends and family members serve as her security guards.
5. Kanye West: Has used friends and associates, including rapper and producer, Tony Williams, as security guards.

Politicians:

1. Donald Trump: Had a volunteer security guard, Keith Schiller, a former NYPD detective, who served as his personal security chief during his presidential campaign.
2. Hilary Clinton: Had a volunteer security guard, Todd Purdum, a former State Department employee, who served as her personal security chief during her 2016 presidential campaign.
3. Narendra Modi: Had a group of volunteer security guards, including former Indian Army soldiers, who were not professionally trained.
4. Jair Bolsonaro: Had a group of volunteer security guards, including former police officers, who were not professionally trained.
5. Vladimir Putin: Has used former KGB agents as his personal security guards.

Please note that this list is not exhaustive and there may be other cases that are not publicly known. Additionally, it's important to note that having non-professional security guards can be risky and may not provide the same level of protection as professional security services.

Artists and Celebrities:

1. John Lennon: Had a friend, Jerry Hopkins, who was a journalist and not a professional security guard, serve as his personal bodyguard.
2. Elvis Presley: Had a group of friends, known as the "Memphis Mafia," who acted as his bodyguards.
3. Marilyn Monroe: Had a friend, Peter Lawford, who was an actor and not a professional security guard, serve as her personal bodyguard.
4. Jim Morrison: Had a friend, Tony Funches, who was a poet and not a professional security guard, serve as his personal bodyguard.
5. Lady Gaga: Has used her friends and family members as security guards on occasion.

Politicians:

1. Robert F. Kennedy: Had a friend, Aristotle Onassis, who was a businessman and not a professional security guard, serve as his personal bodyguard during his 1968 presidential campaign.
2. George Wallace: Had a group of friends and supporters, known as the "Wildcat Brigade," who acted as his bodyguards during his 1968 presidential campaign.
3. Huey P. Newton: Had a group of friends and fellow Black Panther Party members, who were not professional security guards, serve as his bodyguards.
4. Alexandria Ocasio-Cortez: Has used her staff members and volunteers as security guards on occasion.
5. Nelson Mandela: Had a group of friends and supporters, known as the "Mandela United Football Club," who acted as his bodyguards during his presidency.

Realated

Here are some extreme cases of normal civilians being recruited in unusual situations:

Military and War:

1. The Ghost Army: During World War II, the US Army recruited artists, designers, and actors to create inflatable tanks, fake military equipment, and other deceptions to confuse the enemy.
2. The French Resistance: Civilians, including women and teenagers, were recruited to spy, sabotage, and fight against the Nazi occupation during World War II.
3. The CIA's Extraordinary Rendition Program: Civilians, including contractors and informants, were recruited to help capture and interrogate suspected terrorists in the War on Terror.

Law Enforcement:

1. The Guardian Angels: A volunteer patrol organization founded in the 1970s, made up of civilians who patrolled high-crime areas to deter crime and assist police.
2. The Texas State Guard: A volunteer military force made up of civilians who assist in disaster response, border security, and other law enforcement tasks.
3. The Guardian Group: A volunteer organization made up of civilians who assist law enforcement in investigating and preventing child sex trafficking.

Intelligence and Espionage:

1. The CIA's NOVA Program: Recruited civilians with no prior espionage experience to work as spies and gather intelligence in foreign countries.
2. The FBI's Citizen Academy: A program that recruits civilians to assist in investigations and gather intelligence on criminal organizations.
3. The NSA's Language Analyst Program: Recruits civilians with language skills to work as intelligence analysts and translators.

Disaster Response:

1. The Cajun Navy: A group of civilians who use their boats to rescue people during natural disasters, such as hurricanes.
2. The Volunteer Emergency Services Team (VEST): A group of civilians who provide medical and rescue services during disasters.
3. The Community Emergency Response Team (CERT): A program that trains civilians in disaster response and emergency medical services.

These examples illustrate unusual situations where civilians have been recruited to perform critical tasks, often with minimal training or experience.