Ask HN: Is there a blacklist of careless spam-reporters?

My app's emails have recieved 10 spam complaints out of 11,000 sent, which has knocked my SendGrid reputation down to 85%, despite clearly marked unsubscribe links included at the bottom of every one. The posts I've read about how to reduce spam reports tell me to do everything short of a giant, flashing "UNSUBSCRIBE!!!" link at the top of all my user emails.

I'd prefer not to burden the other 99.9% of my users with prominent, ugly unsubscribe links or double opt-ins upon signup, for fear that one of these 0.1% of recipients will carelessly hit the spam button instead of unsubscribe. It would be great to have a service that would allow me to (a) report email addresses of users that have unjustly marked me as spam and (b) check a new user's email address against their database to find out if other app developers have had problems with that email. Then I could take measures to avoid sending those users any more email than necessary.

Does such a service exist?