stigma
At least of here in Germany, something like one out of one-hundred university level students attempts suicide every year.
A shocking number succeed.
I doubt that things are much better in the 'States...
It is enormously hard for a "healthy" person to accept that they need to talk to a psychologist or psychiatrist; the first question most students ask in the counseling center here is:
"Will this go on my record?"
The second question is:
"Will my parents find out?"
And these are, legally, adults who can not be coerced into anything - thanks to the atrocities of the Nazis in post-war Germany it is damned hard to get intervention for someone who is desperately mentally ill but won't seek help.
Lawrence is right, by the way - mental illness is a term like allergy - it covers a very wide range...
After all, if you ever have had a cold sore...technically, you have VD!
My own students have wanted to talk about nothing else all week and this is one reason I so firmly refuse to have an opinion. I made a point of "running into" a group of the Americans over here. Poor kids.