Sometimes you'll hear that a particular penny stock will rise because of a tremendous short position in the stock and an upcoming short squeeze. We'll say it again. Large short positions in penny stocks don't occur because it is almost impossible for anybody outside of a market maker to take a significant short position in a penny stock. There has yet to be the penny stock that had a rise in price because of a short squeeze. Very few brokerage firms will allow you to short penny stocks and those that will encounter so many restrictions that it is impossible for a significant short position to exist.
If a stock promotion hasn't been successful then it must be the fault of the naysayers and the shorts. It couldn't possibly be that nobody was buying the story or that insiders were selling into the promotion. Comments in follow-up emails like, "We were battling with the shorts", are a sure sign that a pump and dump program was on. The battle was not with the shorts but with the insiders who were filling all the bids they could. After all, if the so-called shorts were willing to sell stock at lower prices, then why wouldn't they have hit bids prior to the promotion?