Sure you can name them, but be very certain that you are correct because you expose yourself to slander-libel laws.  Really only the courts can make a judgement on copyright issues but prosecutions are fairlly rare because they can get expensive , and the law is not clear in some areas, and even if you win your reward may be the item is pulled from sale. Punitive awards are not available for unregistered copyrights in many countriess.