Hardly. According to this article the most they'd need to do is basically give credit, show changes etc.. in other words just comply with GPL.v2 requirements.Are these licenses filed with a federal agency? If so, considering Xecuters location, the worst I can see happening is the SX distribution server site being moved around like Pirate Bay is. Or being blocked in participating nations by national copyright enforcement agencies. But even that would surely cost a large amount of money and manpower to execute, wouldn't it?
https://www.itworld.com/article/2734669/it-management/how-scary-are-gpl-violations-.html