definitely, such essays can be a sign of being a disturbed individual but one should not make such conclusions without getting to know the person.
Just like if I write depressing stories, will that mean I am disturbed person?
So we expect all our children to be creative in the sense that all they write about is the sun shining, the birds singing and fairy tale endings.
Anything else is considered to be disturbed individual.....?
For someone of that age to go out of the norm shows the courage not to conform. Then again, as I said, it should be checked whether such a thinking is from family background or his own creation.