Actually its a drop in positive air ions, it has been reported by many groups around the world. However most of these guys only have ion detectors not counters, and negative ions are utilised quite commonly by devices like air conditioners to purify the air. In short it is a thoery, thats it. The premises for the device was a 'what-if' scenaro, as in 'what if said paranormal enities (if they exist we are not saying they are!) use +ions as a powersource?' which spun of after a few experiments and generated the need to produce +ions.
We never take what other people say as truth, but we do investigate it, find the origins of the rumor and test to see if it is possible or not. (mainly not) You also need to remeber that ions operate on electrical theory, there is no such thing as electrical science, so everything based on it could be wrong, even yours. All we can do is test, test, test and keep evolving until we figure it out. So to answer your question; Right or wrong we still have to test it and find out for ourselves. We are trying to whittle out all these little rumors and thoeries one at a time.
As for my camera, due to the nature of the inccident being a non-repeatable cociecident, it was immediately documented and dismissed as evidence. I don't quite think you inderstood the way we operate, but hopefully this will clear it up.