The following article has appeared in the newspaper in Greymouth today possibly linking the presence of a geocache to muggle vandalism (it sounds to me like muggles have found the cache, and things have perhaps gone downhill from there).
Moneydork, as President of the GPS Society, has the contact details for Mr Devlin in the article, and plans to contact him tomorrow to discuss this case further.
The cache has now been archived.
A point I would like to make, is that this is a good reason why caches should not be placed in, on, or under buildings unless explicit permission is obtained. And yes, I realise that the damage in this specific was most likely caused by non-geocachers - perhaps based on the graphic text in the logbook that was passed onto police.