A while ago, I came across the concept of paper abuse in the context of coercive control - and it is precisely that, the process of sending multiple legal letters which require a response (thus costing the target financially or emotionally).
My ex did this, all the way to court. He did not succeed in getting what he wanted, because I had justified concerns. But that is how far it went to shut the harassment down.
I feel for Venice Allen and Linda Bellos as going from hearing to hearing is so stressful. But the tactic works to silence or comply because of the fear of being in court.