It means to do something in a manner or to a degree that is beyond normal. It can imply a negative sense of being “too extreme,” but not necessarily. Negative example: He was so jealous that he went so far as to hire [or, went as far as hiring] a detective to make sure she wasn’t having an affair. Positive example: “The police went so far as to search every house in the neighborhood to try to find the missing child.”

"some go as far as" means that since safe rooms are quite popular among people, some of them even install bulletproof shutters, it's an extreme reaction against a situation. They take this issue so seriously that installing this system is as far as they go. I'm gonna write u a sentence using this expression: Running away from this country has become the best choice among young people, Yet, this is turning into a direct road to homelessness, since many decide to leave their places in the early teenage years. Some go as far as leaving the country with only 10 years old!!!.

In this case you could substitute “take exceptional measures such as” “go as far as” is often used to describe speech. Some people think he’s a genius. I wouldn’t go as far as that, but I agree he’s intelligent.

"Some take a step that borders on being extreme"