"that would make many loans more difficult to issue"
Maybe in some cases, but I'm broadly skeptical. Selling bad debt is usually not an important part of non-shady businesses models. 2nd order effects, if any, are likely to be the main concern. If a business is known to offer 10% settlements after 2 years... that predictability will eventually be taken advantage of.
Honestly, I think the debt stuff (also aspects of copyright) are just the loose ends of major industries. Most bad debt or long tail IP assets aren't worth much. But if you can bundle, they're never too small to monetize.
Once you have an industry dedicated to squeezing that last drop... you probably have a destructive industry.
IMO, the best solutions is policing. Somehow, policing is rarely mentioned as a solution to corporate crime. That might mean occasionally tweaking laws to help make policing effective... but that only makes sense ifyou are already policing.
I bet these trolls are as sloppy as the victims they're targeting. At least in debt collection, at a certain depth... they're not doing any due diligence. Often, all they have is a name, number and sum. That means they often are collecting on BS premises. Charge them with fraud, or racketeering. A business practice premised on demanding payment of a debt, without proof that the debt is real... that's an extortion racket.
I wonder if the trolls here can stand up to scrutiny. Do they actually own the rights? Have they based their business model on strategic avoidance of due diligence? From what I've heard, IP trolling exists by exploiting liability limits of both corporate law, and practical law enforcement.