Open adversarial system like this is hard to balance. If you give private people the privileged access required to effectively investigate, it also gives them a

Open adversarial system like this is hard to balance. If you give private people the privileged access required to effectively investigate, it also gives them a lot of leverage be a harassing nuisance. "Bounty hunter" is not a positive epithet for a reason. If you give the targets the power to shield themselves from that nuisance, it becomes too easy for them to impede rightful investigation.