I agree, but am not willing to spend the time to correct. If this would be a domestic issue, it would be easier, but there are some countries, you really can't do anything.
So I move on, don't know if it is the right thing to do, but that's how I handle it.
If I find one that is used commercially, and the person bought it from an agency that stole it from me, I file a DMCA and usually they pay me, because they did not know, it's about a 40% chance. Theft is really not my biggest problem, it's license fraud. People will buy the smallest RF license and then use in a way that needs an extended license, that happens a lot to me.