Suicide vs. the Value of Life

I came across an article on the Internet where a self-proclaimed philosopher believed that suicide was the ultimate expression of freedom because one had control over one's life and death. Since there had been several incidents in this country where a person, who was suicidal, had killed other people before killing themselves, I wanted to pose a question to everyone, especially those who adhere to the aforementioned philosophy. If people don't value their own lives, why would they value the lives of others?