Joel Reidenberg, visiting professor of information technology policy at Princeton University, said the ruling was not surprising, "given the current tenor of US-European privacy relations as a result of the Snowden revelations."
A "fundamental divide" between the European and American worldview is becoming evident, he said.
"In Europe, there is a sense that privacy and control over personal data are basic human rights," he said. In America, freedom of speech and free-market solutions tend to prevail, he said.
Nico Sell, who runs San Francisco-based Wickr, an encrypted messaging service, said it would make more sense to let individuals, not tech giants, control their own online presence.