Apparently I have 15 posts today, so please let me correct a misconception about DKAM and short-selling (though of course you're welcome to do as you wish to prevent any shares you hold from being borrowed). First, an OTC-BB stock cannot be shorted by a regular retail investor. Market makers can do so and there may be some online day-trading brokers that somehow allow it, but even a NASDAQ, AMEX or NYSE stock can't be shorted by a retail buyer if the price is under $5, I believe. Market makers are exempt from having to borrow shares (they can naked short sell) if necessary. Second, if you check out the short position on DKAM at http://www.otcbb.com/asp/OTCE_Short_Interest.asp, you'll see it's currently under 15k shares and rarely gets much higher. It's been down below 1k shares in one of the recent reporting periods.
Short sales are reported twice a month showing the open short positions on that date. While it's certainly possible that someone could short the stock, then close the short position between periods and not show up in the numbers (again, assuming that someone could short a BB stock at 25 cents), they'd likely move the price up by having to close out the position so quickly.
Naked short selling (while very unlikely in a micro-cap like DKAM IMHO) of course means no actual shares are borrowed, so protecting your shares in that case is pointless, as they are not needed anyway.
Of course everyone is free to do what they please with their stock, but I wouldn't spend a great deal of time and effort to protect them from being used for shorting.