I have, and my experiences have been that:
* The domain registrars are apologetic and well-meaning, but tend to explain that they aren't empowered to take this stuff down without being ordered to by Law Enforcement or similar. There typically isn't a mechanism available for getting LE to respond before the phish campaign is over.
* The hosting providers chosen by phishing sites are either "bulletproof hosts" who are tacitly complicit, or more commonly are so low-end that the support departments are massively underfunded and abuse reports take eons to be processed.
Either way, the phisher achieves their objectives before the site is taken down. That being the state of affairs then, although I don't choose to use the kind of tactics outlined in the blog myself, I find it pretty hard to condemn those who do.
EDIT: I do agree with you that submitting the URL/IP to abuse blacklists is a helpful and positive thing to do. Here are a couple of submission URLs (there are many more): https://pulsedive.com/submit/, https://www.abuseipdb.com/report.