The trademark owners apparently haven't decided to pursue their rights against the t-shirts these guys continue to sell. The point is that we want the rights holder to have the mechanism available to get relief if he or she so desires. You can do that in the United States. In other countries, it's not so easy. Getting a country to enact a law is fairly straightforward and relatively uncomplicated.
Enforcement is much more complex.
Many developing countries' enforcement systems, judicial systems, civil and criminal justice systems are much less developed than in the developed world. It can be difficult to get prompt enforcement. Police and judges may or may not be corrupt. Even if everyone is honest, there often are not enough police or judges. So it's hard to get raids run.