I never understood the whole concept of “bounty hunters” in the US it’s not the Wild West anymore.
The problem here is that “fugitive recovery” doesn’t need to meet any of the standards normal law enforcement does and unless they kill someone or injure bystanders there likely won’t be an investigation into their conduct and even if there is one the result is often that at worse that could happen is then loosing their license. Criminal investigations against fugitive recovery agents are pretty darn rare and there is no internal affairs or any body that really investigates their conduct on a regular basis.
I’m pretty sure that a large amount of these people violate much more than the privacy of their targets on a regular basis.