https://darknetdiaries.com/episode/79/
https://citizenlab.ca/2020/06/dark-basin-uncovering-a-massiv...
Well, digging up dirt is also legal in the west, the question is what "any means necessary" is. I cannot believe that it is legal to hack someone for example.
Similarly, I wouldn't be shocked if "by any means necessary" is also illegal in India but is culturally accepted.
On some level it's no different from the stop-sign culture in California. Almost nobody stops, ever, including the police force, and it results in dozens of deaths annually just in my community. The act is blatantly illegal for good reason, but it still happens out in the open, and it's "not illegal" in the sense that if a person blows a stop sign and the police witness it or are sent a video of the act then there's approximately a 0% chance of any negative repercussions for the perpetrator.
Easy, you just hire a another hacker/PI to investigate them first...