For example, I opt out of all emails from a website. A year later they make a new newsletter and auto subscribe all to it.
I login, hit unsubscribe, then report as spam in my email client.
I figure auto adding me is more/less spamming me. Do y’all agree?
That’s probably illegal in your country (and for good reasons). You should report to the correct organization rather than the email client, which only affects their spam filter