We have an instance we we would like anonymous public traffic to freely view/browse the forums, but restrict the ability to download files to people who have accounts (required logged in). I looked through the settings and didn’t see anything alluding to such a capability. This is pretty common configuration/behavior for other forum solutions. wasn’t sure whether there is a philosophical driver for not having this type of functionality, or it just hasn’t come up yet.
+1 for this feature.