Did Law Twitter provide anything to back up their claim that Vic's representation's 1200-page TCPA response is malpractice?
My understanding is that in order to defeat a TCPA motion, the plaintiff has to show that there is enough evidence backing their initial claims that they have a reasonable chance of winning the lawsuit. That's how most anti-SLAPP statutes are supposed to work, anyway -- unless the plaintiff can prove that they're not filing a bullshit lawsuit intended to swamp the defendant in ruinously-expensive litigation, the lawsuit gets thrown out and the plaintiff has to pay the defendant's attorney's fees.
The burden of proof is on the plaintiff -- Vic. Vic's counsel has to prove to the court that they have enough evidence behind their claims that their case might succeed. IANAL, but this it seems that the plaintiff's best course of action here is to respond with as much evidence as possible. Whether all of the evidence will hold up to scrutiny is a lower priority at the moment. The evidence's validity, under these circumstances, is less important than its volume.
That's my understanding, anyway. Legal kiwis can probably explain it much better than I can.