They didn't kill the company.
The company was extinguished from within.
Shorting a security that's overvalued, even "naked shorting" it, is the correct position to take when confronted with a stock like BCIT.
"The penny stock investor may be the most dangerous creature in the investment world, at least to himself.[...]His hypocrisy becomes most apparent when he then blames his losses on the greed of others." Robert C. Dugan, Director - JRM Capital