Yeah. Or if they are making a plan based on something that just won't work for OOC reasons. I had this come up--the party was involved in helping escort this artifact to a ritual site. The wizard said something OOC like "I want to make sure that will come back with us when it's done." That wasn't going to fly for a few reasons--
1) They're in a separate timeline and there's already one in their home timeline. BAD THINGS would happen if there was an additional one.
2) It's way out of scale for their campaign, and everyone knows it. For reference, the artifact is one of a pair that have been used in the past to move continents safely. One of the pair was used improperly and caused a cataclysm that shut off magic for 50 years, killed the gods and about 70% of the world's population.
3) It's established in-fiction that the artifacts have somewhat of a will of their own and tend to vanish once used, only to pop up again later elsewhere.
So I said as much. No issues, just being clear that that's not included in the possible options on what to do in this case.