Adam Keller, a spokesman for Gush Shalom, a group that has unsuccessfully challenged the law, said he was not sure that an Israeli court would accept the idea that “being deprived of the pleasure of listening to your favorite singer would be considered damage.”

“There is also a serious question to whether Israeli law can even apply to people in another country,” he said. “Only on things that are considered universal laws, like genocide or piracy, is that normally accepted.”

Any attempt to enforce a judgment in such a case, he said, could quickly become a diplomatic problem for Israel.