"However, our success has been marred by recent Facebook postings denouncing the rahui as unworkable and unsuitable. We want to re-assure people that the rahui is very much alive and well, and that the tapu associated with it is intact and working.
"We have personally seen the evidence for this assurance, and are regular enough visitors to Otia to know the truth about how well the rahui is operating."
Those who did not like the rahui model, and would prefer Pakeha law to have pre-eminence, were looking back, not ahead, to old ideas, notions and practices.
"We can't afford to waste time entertaining fools who join from the sideline, ill-prepared to make constructive comments," he added.
"It is the old adage that if one has nothing nice to say about something, then let those who do get on with it."
Mr Piripi said the rahui, a pre-European concept derived from an understanding that everything between the sky and earth was inter-connected, had been put in place in response to the "raping and pillaging of our marine environment."
It had been clear that neither European law nor any individual could protect Tangaroa, so the iwi, local marae and the community of Ahipara joined to mandate the implementation of a traditional rahui, which for the first time in more than a century invoked the laying of a tapu as a form of environmental protection.