Google updated their spam reporting documentation once again, this time to say that spam reports need to be confidential, and if they include personal identifiable information they won't be acted on. Here's the new wording:

“Don’t include any personally identifying information in your submission. To comply with regulations, we must send the submission text to the site owner to help them understand the context of a manual action, if one is issued.

Because of this, we won’t process your submission if we determine it contains personally identifying information to protect privacy. Not including such information fully ensures your information is safe and prevents your submission from being discarded.”