Stranded on an island again?

Another party weekend is upon us on Waiheke and Fullers have been putting up posters on the ferry "advising" party goers to return on the 8.15pm and 10.15pm ferries. The only proper response is a Tui ad.
But it shouldn't be rocket science, really. Why not run an all-night boat, say, every two hours, so party goers can relax and enjoy themselves in the knowledge they can get back home at some stage? Basic good customer service and what a ferry service should be there for, I would have thought.
Let's hope the Red Cross is ready this time with blankets and hot drinks for the stranded.