No, that would be called good trading. Shorting is selling shares you don't own. They can't do that. Also note that they are limited to how much they can own, so this means they are limited on how much they could buy back. In any event, I highly doubt they would buy their shares back.
GGI doesn't short, they dilute. The end result is the same.
News 
Market Data 
Discover 
AI
