IT security specialist Backfire Security today announced the availability of a software download as a discrete desk-top client application which wreaks revenge on those hackers and culprits attacking your network or infecting users with worms and/or viruses
The software has the ability to instantly and dynamically 'trace' the IP source address - no matter how well masked - of the network attack/infection and respond by launching either a Domain Name or Mail Server flood attack in the direction of the attacker.
http://www.theregister.co.uk/content/28/30036.html