I just learned last night that the placement of munzees in unpublished caches is being monitored by some FTF hounds to score the FTF on these caches! This was news to me, as I don't do the munzee thing.
Apparently, when a munzee is activated at the cache location, munzee seekers are alerted and can check the munzee site to see if there is a GC code referenced. This gives them a "heads up" that a new geocache is going to be published soon, so they can be ready to dash out the door as soon as they get the alert that the cache has been published. They even know ahead of time where to go. I know of one case where the FTF hound actually found the cache the day before it was published, using the munzee system, but didn't log it as found until the day it was published. Very dishonest, if you ask me. That is, the finding of the cache before it was published and then claiming the FTF. But I guess folks play the game in different ways.
As far as monitoring the munzees to see when new caches are coming out, I don't think that is dishonest; it just provides the FTF hound with an advantage over non-munzee hunters. But if you want to give everyone a fair chance at being the first to find on a new cache, you might wait until the cache has been published before placing a munzee in it.
I'm curious as to what do others think of this practice.