Hi Ben,
The lists were put in place to offer full transparency on the moderation of the lists when that was introduced a couple of years back.
See:
This is an unmoderated archive of the RIPE Discussion List, available for transparency purposes. This archive contains all mails sent within the last three months to the RIPE Discussion List, junk mail, mails sent by non-subscribers and emails that didn't satisfy the moderation criteria. Please be aware that this may contain offensive content.
The unmoderated archives are retained for at least three months, all moderated emails can be viewed in the RIPE Discussion List archives.
Please note that only subscribers can post to the RIPE Discussion List.
And
-hph