Ban the victims
So, having your site attacked makes you unacceptably disruptive:
In a statement on its website, the free everydns.net service said that the "distributed denial of service" (DDOS) attacks by unknown hackers – who are trying to knock WikiLeaks off the net – meant that the leaks site was interfering with the service being provided to other users. That in turn meant that WikiLeaks had broken everydns.net's terms of service, and it cut the site off at 3am GMT on Friday (10PM EST Thursday).
Democratic Underground used this "reasoning" all the time (and probably still does). If hordes of Obama apologists attacked you — regardless of how fair or rational your post was — the mods locked the thread and shamed you for posting "flame bait."
All part of our culture of STFU.