Korea has come a long way in terms of protecting intellectual property. While one can find pirated DVDs and other things, it is nowhere nearly as bad as what one might encounter in China. If you click this link, you will be rewarded with a photo of a pirated DVD shop operating right next door to a police station.
That being said, I have noticed company logos in Korea which would be grounds for a trademark infringement suit in America. Exhibit A is this hair salon in Jeonju, North Jeolla Province. There are now many English loan words in the Korean language. One of them, 파마 (pama), refers to a perm. (I have a number of students with perms. Strangely enough, they’re all boys.) I thought it was a shoe shop when I first saw it.