On Insomni'hack contest organizers website (SCRT.ch) was found cross-site vulnerabilities. Hacker companies, which themselves are compromised, can not be an example, which could learn.

The primary issue in internet security is not that hackers troll the Internet, but rather that the Internet is chock full of insecure systems which are easily compromised, providing means for hackers to perform untraceable, indirect attacks. The only profound way to improve Internet security is to reduce the number compromised systems and minimize the amount of time that a system remains in a compromised state.