My guess would be to allow players to put status marks on tokens they don't control such as when a player cast's Hunters Mark or some such...? If so, I'd be in favour of a game by game toggle to allow such functionality for players... as the OP says, when you have a group you can trust it would be great to be able to assign some DM-like duties to them. In the meantime, a Pro subscription on the creators account will allow use of the API and therefore the tokenMod script which can be combined with @{target... to allow players to interact with tokens that they can see but not control ;)