Option to exclude certain weapon attachmentsSuggestion

With one of the recent updates, Oil Rig and Giant Excavator scientists now show in DeathNotes. Since there seems to be no discernible way to add specific scientists as different types of "victim" (Yes, I know these is for Scientist Sentry), I thought I'd try to write in an extra line for when specific attachments (silencers) are used. So that way if players want to keep their kills hidden, then could put a silencer on any weapon to remove their kills from chat. I tried the following for example, but it automatically removes <"Attachments": "Silencer">, when I reload the plugin:

      {
        "KillerType": "Player",
        "VictimType": "Animal",
        "DamageType": "Bullet",
        "Messages": [
          "{killer} vaporized a {victim} using their {weapon} over a distance of {distance}."
        ]
      },
      {
        "KillerType": "Player",
        "VictimType": "Animal",
        "DamageType": "Bullet",
        "Attachments": "Silencer",
        "Messages": null
      },

^ In the above example I was hoping Animals deaths show when not using a silencer, then when it's attached no message would display. But it seems that this isn't possible, or I'm not writing the config the right way.

Not sure if this counts as user error, a bug, or a requested feature.

I run a solo only server, and I guess could remove all scientists from even showing in chat. But I was hoping there would be some happy medium.

I don't want CargoShip, OIl Rig, Giant Exacvator, Mil Tunnels, etc being rushed by everyone when someone is trying to solo it.