Once detected, don't block them because they'll just change strategies automatically, but you can toy with them, like returning a page full of random numbers instead of real data.
I’d love to, but I’m a bit limited in what I can do from a reputational damage POV. They’re my sites, in that I’m responsible, but they aren’t something where I can return incorrect responses.
Yeah my search engine saw traffic of up to 160 queries per second the other day from some bot that was ostensibly searching for information on Jack Parsons. Just variations on the same query in different permutations of filters and site:-terms.
No I think this is the same case. It seems to just be following local links on the SERP. From a search for jack parsons, you can find hyperlinks to the sorts of requests it's making.