I ran across an old article from the Huffington Post, where a journalist talks about his fears of letting the world know he has Aspergers, and how being bullied in the past made him afraid to be open about it and led to depression. The following from the article is a very powerful statement on why people are close mouthed about their issues:
People are often afraid to work on their problems because society tells them that suffering from depression or just being eccentric means you're crazy. And if you're crazy, your ideas don't matter, your thoughts don't matter, you don't matter, so most people try to hide it instead of working to improve their lives in the open.
How can we encourage people to be open about their mental illness?