It's needlessly generating excessive amounts of trash and waste. It's wasting tax money. It's hurting the next blind person who won't be able to fax his documents because the machine is down/overloaded. It does not show why fax is stupid. It shows that faxing reams of unnecessary paperwork is stupid. It does not show that they should accept PDFs over email (genuinely a great way to get hacked). There is no benefit in trying to DoS the SSA office.
The employee probably already knows fax is stupid, and was probably looking forward to the proposed new secured document portal, but the legislature voted down the funding again this year so they could claim to be fiscally responsible. (Don't know the author but I do know govt workers who have expressed this kind of frustration ) Blind author needs to piss off their legislator, not a cog in the machine.