Request: Ability for users to "report this personal message" for rules violations

[Catch-22|BL]

Hopefully everyone understands the idea behind this suggestion.

If someone sends a PM that breaks the site's user agreement, it would be nice for the recipient to be able to hit a "report this PM" button so they could bring it to the staff's attention.

Specifically an email is sent to an email address or mailing list that describes who is making the report, has room for the complainee's comments, who the message was from, the date of the PM and an exact copy of what was said in the message (including any "quotes" from previous replies). Then the recipients of the complaint could review the evidence and take action.