The taking, then not logging and then not re-releasing of geocoins really seems to be an unfortunate ongoing trend. Seems that a lot of people (most new, and even some of the veterans of geocaching) have no idea about how to trade even or trade up. Seems to be a lot of "junk" items appearing in caches we are finding and most of this trend has gotten worse just since January it seems.
To show how bad it is in Kansas City, I placed a geocoin on 6/6 in a cache called Kandor1234 that I picked up in Indiana in May. Two people logged the cache today (6/8) and noted that the coin was not there, even though no one else has logged the cache since I was there on Sunday. Everything else we placed in the cache was traded though.
Then again the geocoin could be like one of ours, where it was placed in a rarely accessed cache 6 feet up in a tree and left there for over 3 months. When rescued it was taken to another cache that also has very few visitors so it was stuck there another 4 months and just recently moved and has not been re-released into the wild yet. We are trying to get the coin to Thailand, but so far it has gone about 200 miles east-southeast and then back through Kansas City over to middle Kansas, meaning that it has never been more than 200 miles away from it's homebase. But at least it hasn't been muggled.. or worse put into someone's private collection that they traded 1 green army man for.