I agree that shorts can't destroy a business unless the business is in the business of selling stock.
Shorts can and do destroy individual portfolios in an immoral fashion such as what Our-Street does.
I still wonder why you think what he does is "good"? You can't even compare what he does to Pump and Dumps. At least with P&D's, investors/traders have a chance to get out at incremental losses rather than a flat out bottoming out.