In his Who Protects The Internet? article, Matt Rutherford mentions something near and dear to us as an example of hackers, er, citizens protecting the Internet:
Just look at Dan Kaminsky, a computer consultant who discovered a fundamental flaw in DNS, allowing him control over any website online. This flaw was astounding in what it gave access to – yet Dan Kaminsky didn’t turn to a government agency or organization, or abuse the hack himself. Instead he made a phone call to Paul Vixie, one of the creators of the BIND9 DNS routing software, and they assembled a team of civilians and private companies to resolve this apocalyptic vulnerability.