One-Click Email Unsubscribe.. with curl

An annoying pattern about giving a company an email address (especially one that isn’t in a country subject to the GDPR), is that I often will get opted-in, without my consent, to a spam list. I am pragmatic and accept that I’m going to hit unsubscribe once (and no more than once) before I block the tagged email address I’ve given the company… but often when I do click unsubscribe I get this awful workflow: