This reminded me of a Wired article[1] from a few weeks back that argued that many of the kids using these services to DDoS their friends/rivals don't realize they're illegal—so federal agencies are taking out keyword ads to warn potential users:
> In fact, he and other members of [cybercrime-busting group] Big Pipes argue that most booter customers seem to believe—or convince themselves—that merely paying to use one of the services to knock out an adversary’s internet connection isn’t against the law, or at least isn’t an enforceable crime. When the UK’s National Crime Agency (NCA) ran a six-month Google advertising campaign in 2018 to intercept people seeking booter services and warn them about their illegality, Clayton’s research group found that attack traffic in the UK remained flat for those six months, while it increased at its usual pace in other countries.
> In the years since, law enforcement agencies seem to have learned from that experiment: The FBI now also buys similar Google advertisements to warn potential booter customers that paying for the services is a crime. The UK’s NCA, meanwhile, has not only launched new advertising campaigns but even run its own fake booter services to identify would-be customers and then send them warnings—sometimes even with in-person visits—about the consequences of paying for criminal DDOS attacks.
[1] https://www.wired.com/story/big-pipes-ddos-for-hire-fbi/ (For the relevant bits, scroll to the "Honeypots, Google Ads, Knock-and-Talks" section)