Etherlord Clan: I visited today and replaced the cache.
Given the comments about the Coords being out (which I had never experienced when I have visited to test them), I decided to take some fresh coords and compare them.
I left my GPSr in front of the host averaging some new readings and sat down a few meters away while waiting.
I had only just sat down when two teens biked up to the tree. One grabbed the pine cone that I had put in front of the cache and threw it over the fence and then grabbed the cache.
I jumped up and asked what they were doing. The main one said that a kid at school had told him about the 'thing in the tree' and he was now wanting to show it to his friend.
They asked if I knew what it was, which I educated them as best I could without taking my frustration out on them.
Despite (trying to) educate these two, there are plenty of others at school and I am calling Time on this obviously compromised location.
With some sadness, but much relief of frustration, I have decided to go through with my previous comment and Archive this one.