You may have missed the part where I described how I open emails with "You're receiving this email because of xyz. Please blocklist your email if you don't want any more". The link to unsubscribe/blocklist is at the top of the email. They are simply abusing the "report spam" button. They applied for something, or someone used their email to apply. Getting a response to that application is not spam.
>If you are attacking the intelligence of your users
I'm listing supporting facts for why it's insane to let less than 1% of the population to dictate something for everyone else.
> You want to send marketing email
Email. Not marketing email.
>you opted to use a cheaper service that has documented considerations for reputation impact. You know the correct solution, you just think you are entitled to a lower cost service
This is incorrect. I addressed it in a previous comment: https://news.ycombinator.com/item?id=41708652