Elon loves to shove himself front and center into the public eye and to stoke a fanbase. Large groups of people inevitably contain some crazy ones. Obsessive para-social relations often lead to unhinged fans stalking or harassing the targets of their obsession. This is so common it has a term coined by Eminem: "Stan".

> How can we prevent this from happening again?

Celebrities are often stalked not just by fans but by reporters. Princess Di was arguably put in a situation by photographers which led to a car crash and her death. It appears the solutions are either:

(1) Don't be famous, or be the type of famous person that has a low profile (there are a lot of them)

(2) If you are a billionaire then you can afford a security detail -- get one

(3) Support real mental health efforts and legislation which funds support for people with mental health issues, instead of sticking them in prison or making them live on the street