Confirming spam reports

Someone floated the idea of having ISPs confirm that a user really wants to report a mail as spam every time they do so. The original poster was asking for comments and what we thought of such an idea.

The only thing I could think of is the poor woman who’s been gone for a week on vacation and is selecting large swathes of her mailbox and hitting “this is spam.”
She then gets mailbombed by her ISP with confirmation messages.
She then selects all the confirmation messages and reports those as spam.
Repeat until something breaks or she collapses sobbing in the corner because she can’t get all the crap out of her mailbox!!!

Asking users to confirm each spam report, either by an email or adding a second popup box is extremely user unfriendly. Users will demand a “confirm all” button, and never read the confirmation anyway.