Well if it's theft then it's been going on and used by everyone for thousands of years. To be upset about this is to be upset about gossip. It's an informal means to disseminate information. It will naturally occur in any sufficiently competitive system.

And the key point may be that the ones being 'stolen from' even allow it because the benefit they get from opening up to new markets usually exceeds the risk of having some of your IP copied.

It's not like the traders who ventured to Japan turned around just because they knew that the Japanese would try to catch up by any means, or that the British stopped trading with Germany. (Or that Apple stops to sell or build things in China)