Ghost utilities.

[CalliopeSoups]

I think it would be a good idea to let ghosts scan for reagents, health and atmosphere (and any other types I'm forgetting) somehow. I often look at some weird food or chemical and wish I could know what was in it, or wish I could see what was happening to the guy looking in a complete state on the floor.

The only issue I can think of for this is powergaming, but in that case you could have it only be available to ghosts with DNR on.