This idea is intended to be a bit less "silly" than my earlier deer idea...
But I think it would interesting to offer - maybe at the village or realm level - unique items that leaders of villages/realms could use or designate for use to "event planners" and that would generally and generically enable players to run their own events and quests..
1) An object that can create a gate that allows you to pass if your inventory is empty (or similar checks) - this item would enable events (example: treasure hunts, races or item collection competitions that couldn't be cheated)
2) A random object dispenser (like a blind chest a player can reach in blind and pluck an item from (for prize pools and randomizing prize giveaways), but that would destroy the contents on attempts to steal and destroy it
3) A certificate/award/trophy item(s) using existing systems like paper, cloth, wood, frames etc - that can be text customized as prizes or gifts for varying events and contests
4) A "bury" and "dig" system - shovel and chest and designated area or some such to enable treasure hunt type events
5) race track/obstacle course style terraforming option that would create a unique track
6) a stage
I have a whole lot more ideas along these lines - but I figure the gist is above and simply summed up in the idea of creating non-imbalancing generic items that with a bit of creative thought and planning, can be used to create some fun and unique game-wide events that can be run by players.