Forum hacked by another forum
 

So there were existing problems between my forum and another forum that is also a vb forum and we've been hacked by them. Is there any chance that something can happened to the people that hacked us?

Here's my forum:

http://www.sfgforums.com/boards

The forum has been replaced by the people who hacked it with a youtube video.

Here's the forum that is responsible for hacking our forum:

http://www.editingonacid.com/fourms

I'd like to know all action that I would be able to take against the people who hacked us.