It's a MASSIVE case of false problem.
Focus your efforts in increasing the user base's willing to purchase rather than chasing on pirates and chances are you will get more sales for your game.
Beside, I don't want to derail a thread in an argument about how piracy works, but there are few known facts about piracy.
- Any attempt to actually study the phenomenon in the last years seems to suggest that for the most part "pirates" are actually people that consume large quantities of the media they pirate even in legitimate forms, any time they can realistically afford it.
- Apart from that, a massive chunk of the download traffic seems to also come from countries where most of the times these media aren't even properly available/realistically affordable (China is often mentioned).
- Preventing people from copying software/music/movies won't make them magically more rich. If someone is used to buy ten games for year and pirate the rest, making impossible for that person to pirate won't give him/her more money to buy more media.
- There are not known instances of super-popular top-pirated games that don't end up being also very popular sellers in general.