[Toadling]

Perhaps there is no official support for arbitrary lists, but I see no reason you couldn't use OmniFocus anyway. It doesn't matter what others are doing if it works for you.

To keep your list from showing up among your actionable items, you could assign all the non-actionable items to a Context that's On Hold or put them all in a Single-action List that's On Hold, or put them in a Folder that's set to Dropped. None of these methods were defined for your purpose but they'll work fine. OF is pretty flexible.