This is going to be fun when election times come in europe. Here we get a lot of unsolicited email from candidate MPs , and i m certain most of them bought/found the addresses from dubious/illegal sources.
The Canadian anti-spam legislation goes so far as to have a specific carve-out for political emails that solicit money [1]. I joined each of the big 3 parties during their leadership campaigns and they all have a practice of ignoring unsubscribe requests, and passing your email address around internally or signing you up to new lists. It’s pretty gross.
[1] https://crtc.gc.ca/eng/com500/faq500.htm