When investigating sketchy sites I have found that domains are pretty disposable and that trying to contact the admin or registrar from the whois data is pointl

When investigating sketchy sites I have found that domains are pretty disposable and that trying to contact the admin or registrar from the whois data is pointless. They can just pivot to another domain at worst and they probably faked the data they submitted to register it to begin with leaving them unaccountable. Services like Cloudflare on the other hand are fully complicit in making abuse easy on the internet. If you want something abusive taken offline it is better to go after whoever is hosting it instead of some pointer to where it is hosted, which is difficult when they are behind Cloudflare. If you want a laugh search Google for the terms "booter" or "http stress tester" and try to gauge the legitimacy of the results.