Moderated Unapproved Comments — Archiving

We moderate our comments. We also receive a number of comments that are malicious and therefore never approved. For reference purposes we’d like to file those malicious comments away and have them readily available for review, but not have them display under the Awaiting Moderation tab (with over 100 such comments there now it’s starting to get a little unwieldy).

I’ve looked for a plugin or some other solution but haven’t found anything.

Suggestions?