An anonymous reader writes "The Guardian reports that many of the security industry's top researchers are being threatened by lawyers and law enforcement over their efforts to track down vulnerabilities in internet infrastructure. 'HD Moore, creator of the ethical hacking tool Metasploit and chief research officer of security consultancy Rapid7, told the Guardian he had been warned by U.S. law enforcement last year over a scanning project called Critical.IO, which he started in 2012. The initiative sought to find widespread vulnerabilities using automated computer programs to uncover the weaknesses across the entire internet. ... Zach Lanier, senior security researcher at Duo Security, said many of his team had "run into possible CFAA issues before in the course of research over the last decade." Lanier said that after finding severe vulnerabilities in an unnamed "embedded device marketed towards children" and reporting them to the manufacturer, he received calls from lawyers threatening him with action."