Auckland restaurant owner Leo Molloy breaks hospitality's golden rule with a vengeance

An Auckland restaurateur has shown the world exactly what not to do when a customer sends through some friendly advice.

After investigating a simple customer complaint, The Project were told by Leo Molloy - the owner of HeadQuarters restaurant in Auckland's up-market viaduct - that the world would be better off without the customer, as well as presenter Kanoa Lloyd.

Molloy even warned the show that he would be likely to react this way.

"I have a lacerating style, so unless you want people to bleed or cry or have emotional breakdowns, you're best not to engage with me."

How did the complaint, written about plastic confetti blowing into the harbour, lead to such a "lacerating" response?

Watch the video to see how the drama unfolded.