When even police joke about it, you know it's time to change the law.
Waikato police have a Facebook post of two cows sniffing cannabis plants and asking for the funniest caption for the photo.
They note: "It's that time of year again when we are wrapping up our annual cannabis operation. While many of you think it's god's greatest gift to us, it is still illegal which means we still police it."
They also note: "Rather than hitting you with stats and "don't do drugs" comments, we thought we'd take a lighter approach and run a competition".
They may - or may not - have a prize for the wittiest remark.