What motivation would a VFX shop have to do such a thing, though? (Money, sure, but what's a motive strong enough to be worth commissioning them?)
It's always individuals who want to harm others in this particular way; and individuals don't throw around big-VFX-project amounts of money on petty revenge. But they'd certainly spend $20.
DDoS attacks got a lot (1000x) more commonplace once there were DDoS services that let you buy an hour of attacking someone for $20. Same idea here.