“Post-9/11 surveillance has caused writers to self-censor. They avoid writing about and researching certain subjects; they’re careful about communicating with sources, colleagues, or friends abroad. A Pew Research Center study conducted just after the first Snowden articles were published found that people didn’t want to talk about the NSA online. A broader Harris poll found that nearly half of Americans have changed what they research, talk about, and write about because of NSA surveillance.”