Ddos

A DDoS is pretty much the most powerful tool of destruction on the internet. It should also be noted at 127.0.0.1 is everyone's IP address and is therefore a good target to hit; here's an example of it being put into action as shown in a ban request:

http://www.exiledservers.net/showthread.php?t=5520

As you can see, everyone is clearly scared shitless.