I have hordes of documents.

Funny enough, one of my attorneys taught me a lesson a long time ago around this. Simplified, she said "only and idiot claims to have lots of documents" to support their action. Sure, it's the easy/lazy way to try and intimidate people with the lowest amount of knowledge about how things work. But anyone with the slightest clue knows 1) talk is cheap, 2) you don't need a lot of docs, you just need the one that matters, and 3) if you claim to have documents, you'll eventually have to produce them, and if you can't, you look like an idiot.

Maybe put another way...don't let your mouth write checks your body can't cash.

I believe the phrase that applies here is "put up or shut up". If you have hordes of documents to draw on as primary sources, then it should be pretty simple (but perhaps time consuming) to write a rebuttal.