He shared a few with Morning Report.
"One goes simply: 'you're a flop', another said: 'you're over", one says: 'They're coming for you - count your days, you are literally so annoying, FAD'."
His favourite was written in Spanish in capital letters with references to witches, the ancient gods and hidden magic.
His newfound fame prompted McCulloch to do some rapid research. He established that there is another Craig McCulloch who works for Ariana Grandee's merchandise team which has attracted many complaints from fans over the quality of its offerings, including sweatshirts and T-shirts, over the last two years.
"So the fans have beef and until recently they've not known where to direct that beef.
"And that changed on Sunday when I am reliably informed that Ariana Grande's concert documentary was released on Netflix and the credits list the people responsible for merchandise, the merchandise managers, and the first person on the list is none other than Craig McCulloch."
RNZ's McCulloch tried to set the record straight by putting out a tweet about the mistaken identity, but that has escalated the situation and he has been inundated with hundreds more tweets, mostly apologies.
"It's quite something to be on the other side of this. They call themselves the Arianators - they are a passionate bunch."
McCulloch says he has not been familiar with Grande's catalogue but he feels obliged now to get more acquainted with her music.
"Her fans seem to have adopted me as an accidental Arianator. I have a bunch of new followers now. Whether or not they stick around for my insightful commentary on New Zealand's political scene, I suspect that is somewhat unlikely."
- RNZ
