I just made a preview version of
No, thank you! addon, which blocks AvA messages outside of AvA world, friends status messages and RaidScore Notifications. I didn't include block for Delete Mail confirmation dialog as in my case it is already blocked by
Postmaster. There is a simple settings (/noty), so you can redirect messages to chat window or select which RadScore Notification should be shown.
If anyone is willing to test it, it is in my dropbox folder (link in the signature). Also if you want any other messages blocked, let me know, so I can add it before official release of this addon.