admir: This is a concern for big developers (like EA) and hardware companies (like Apple) but not generally all that relevant for smaller independent or hobbyist developers.
Yes, your game might be copied by people in other countries -- but it's likely those places weren't your target market anyway. You don't have the budget or resources for much -- if any -- localisation or for foreign advertising, so you're not really losing out on potential sales in those territories, and you can prevent them from distributing to your target market by having their content removed from Google Play, the iOS App Store, Steam, etc.
You can be sued by anyone for anything, and although you may not be able to stop them from selling their knock-off product in their jurisdiction, if you genuinely developed and released your product first it will be relatively trivial to quash and claims they might level against you.
Goury: You might not like intellectual property laws, but they're regularly enforced in courts all around the world, and like them or not they're the reality that many developers -- excepting those in some countries where these laws are absent or poorly enforced -- should be aware of and deal with. I don't mean to be at all offensive here, but to simply claim outright that the legal concept of intellectual property doesn't exist is nothing but foolish ignorance. We regularly see examples of these rights being enforced; you can disagree with them on principle, but claiming they don't exist is simply sticking your head in the sand and ignoring reality.
You are actually somewhat correct, but it's that sort of nit-picking trivial correctness that's not actually relevant or helpful to anyone: you're right that no-one is likely to be run into legal problems specifically citing "intellectual property" as the cause of action -- they won't receive a C&D or be sued for IP-rights violation -- but if they do the wrong things they do risk receiving a C&D or being sued for "trademark violation" or "copyright infringement" or even "patent violation", and -- even if the term doesn't hold specific legal meaning -- it's a useful term because thanks to common usage everyone knows exactly what someone means when they say it; that trademark, copyright, patents, or some other less commonly cited laws are being discussed.