Economics of flooding

Hi, we are doing research on the economics of flooding attacks and we have a few questions; help would be greatly appreciated. Is anyone aware of a process for claiming a deduction in charges when fees are associated with a flooding attack? In particular, attacks may push up the 95% usage or (more commonly) attacks may create prolonged loss of network availability; Both outcomes may result in a claim for deduction. Has anyone ever dealt with something like this? How is this handled today? What evidence or proof has to be provided to get the deductions (if any)? Thanks in advance, Livio.