The guilty parties have put up their hands and admitted to H-bombing six bollards in the Town Basin.
Glenda Ferguson and Heather Carthew also admit to being "geri-rebels", their senior years not stopping them having a great time last Wednesday giving the bollards outside The Bach an unauthorised Hundertwasser-themed makeover.
"Glenda and I were naughty, we did it on our own ," Ms Carthew said. "The rest of the The Bach committee were not aware we were going to do it, but we did ask the building's other tenant as it affects them too, and we got a quiet thumbs up."
Two days later, after being politely asked by the Whangarei District Council's property management department, the pair repainted the bollards bottle green - but not before their #hflash style street art-come-activism went "ballistic" on social media, Ms Carthew said.
Complying with the property department's request, the couple purchased the council-recommended paint and repainted the bollards bottle green. "But," Ms Carthew said, "that paint doesn't seem to want to stick."