>Release open source software with license specifically prohibiting European companies from using them. Even if this happened (which it wont, see sibling comme

>Release open source software with license specifically prohibiting European companies from using them. Even if this happened (which it wont, see sibling comments), it would have to be enforced within the European courts. EU could easily just change laws or choose not to enforce it. And do the same for copyright of American media. Congrats! Now you have started a trade war and Russia and China are laughing in the corner.