If the owner of a trackable is serious about it's mission, the trackable should have a brief mission label attached to the trackable. This will stop them being moved off mission by cachers, especially if a cacher is on holiday.

I do normally check the trackable's home page to check the mission when caching from home.

Usually the important bit, is not to hold onto them tooooo long but sometimes this happens. I'm guilty of this now and again especially with my reduced caching rate at the moment and too many small caches.