I certainly self censor and even now am posting semi anonymously obviously. But those in favor of mass surveillance could answer the study by claiming that if

I certainly self censor and even now am posting semi anonymously obviously. But those in favor of mass surveillance could answer the study by claiming that if the surveillance is kept secret then 1. it won't stifle minority opinions and 2. it will work better By saying this they could not only answer the study's concerns but could now advocate zealously punishing whistle blowers.