I think you are too paranoid or too sensitive.. or both. It is not unexpected that competitors will feel threatended and say stuff about ZEN. They may not even be competitors but they still feel threatened by ZEN. I dont really see how this is manipulation.
In any event, this is the Venture exchange. The king of manipulation. Sure it will go on but when ZEN proves up what it has, the numbers will speak for themselves. There might be some ups and downs in between but that's the way it goes.
I dont think some comment from a two-bit CEO will have any affect when a major mining company starts looking at the numbers.