Interestingly enough, the US Customs Service _permits_ individuals to bring in counterfeit DVDs. From the US Customs Service website (http://www.cbp.gov/xp/cgov/travel/le...oreu_go.xml#15):

Articles bearing marks that are counterfeit of a federally registered trademark are subject to seizure and forfeiture. Additionally, the importation of articles bearing counterfeit marks may subject an individual to a civil fine if the registered trademark has also been recorded with CBP. Articles bearing marks that are confusingly similar to a registered trademark that has also been recorded with CBP, and restricted gray market articles (goods bearing genuine marks not intended for importation into the United States and for which CBP has granted gray market protection), are subject to detention and seizure.


However, passengers arriving into the United States may be permitted an exemption and allowed to import one article of any type, which must accompany the person, bearing a counterfeit, confusingly similar or restricted gray market trademark, provided that the article is for personal use and is not for sale. This exemption may be granted not more than once every thirty days. The arriving passenger may retain one article of each type accompanying the person. For example, an arriving person who has three purses, whether each bears a different infringing trademark, or whether all three bear the same infringing trademark, is permitted only one purse. If the article imported under the personal exemption provision is sold within one year after the date of importation, the article or its value is subject to forfeiture.


In regard to copyright infringement, articles that are determined by CBP to be clearly piratical of a federally registered copyright, i.e., unauthorized articles that are substantially similar to a material protected part of a copyright, are subject to seizure. Articles that are determined to be possibly piratical may be subject to detention and possible seizure. A personal use exemption for articles for the private use of the importer and which are not for sale or distribution, similar to that described above also applies to copyrighted articles.