No. Shorting works when someone sells on the uptick in hopes that it will be going down.
When it hits their target, will buy back the amount of shares needed to "cover", riding it back up and taking profit.
If they "illegally borrowed" shares from accounts that were not theirs, and let's say in this case, where the company comes back but has to reissue shares because the first batch had been voided, it will have to have a different CUSIP number assigned since the old was revoked. That being said, those who shorted with borrowed account shares, are in trouble. Failure to deliver is NOT FAVORABLY LOOKED UPON. It's illegal. Many MM's have lost their standing because of previous actions of the same. In this case, they cannot deliver what is not there.
Dragon52