I’ve actually done something like this in the past. I was able to identify the IP address of a few content scraping websites, and then made my RSS feed return a huge number of gibberish pages when requested from these IPs. I’m not sure whether they eventually ran out of database space or what happen, but these sites did go down after a few days and stayed down. https://www.ctrl.blog/entry/defacing-content-scrapers

(I didn’t attack these servers, by the by. They came to my servers and gobbled up all the auto-generated junk I served them all on their own.)

However, in recent years it has been more and more difficult to identify the right IP address as everything is hosted people are hosting behind Cloudflare or do the actual scraping from a short-term lease server with an unique IP.