Within the first 48 hours group members had named all the taggers and most of the burglars whose photos had been posted, and had helped to find a lost girl.
Anyone in the group can post photos, CCTV footage or information. Others then put names to the images, passing on information, anonymously if required, by private message or an 0800 number. Any useful information is then passed to the authorities.
As well as identifying taggers and thieves, the page has been used to find the owners of stray dogs and get word out about stolen cars and missing people. One crystal-clear CCTV video showed two men nonchalantly rifling through a car while sucking on a home-made bong; a clear series of stills shows two young women and a cross-dressing man emptying out a shed.
The town's relieving senior sergeant, Glenn Taplin, praised the initiative, saying information from the group had led to three significant inquiries. The Facebook page gave police a good feel of what was happening in town, and what the community thought about it.
"It gives the community some ownership, by putting information they know into a public forum. It shows there's some real heart in the Kaikohe community," he said.
To join the group go to www.facebook.com and search for Kaikohe Community Watch.