diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 972f84d744..411fe420e3 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -20,6 +20,7 @@ That said, please do file any bugs you find, keeping the following in mind:
 
 * One issue per bug. Putting multiple things in the same issue makes both discussion and completion unnecessarily complicated.
 * No build issues (or other support requests). If the GitHub Actions CI build succeeds, the build problem is most likely on your side. Work it out locally, or ask in the `#build-problems` channel on Discord.
+* Don't comment on issues just to add a joke or irrelevant commentary. Hundreds of people get notified about comments so let's keep them relevant.
 
 ## Code submission policy