diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 9be2a36..2c82ef2 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -16,6 +16,14 @@ You can also drop into the GoToSocial Matrix room [here](https://matrix.to/#/!md
 
 This is the recommended way of keeping in touch with other developers, asking direct questions about code, and letting everyone know what you're up to.
 
+## Code of Conduct
+
+In lieu of a fuller code of conduct, here are a few ground rules.
+
+1. We *DO NOT ACCEPT* PRs from right-wingers, Nazis, transphobes, homophobes, racists, harassers, abusers, white-supremacists, misogynists, tech-bros of questionable ethics. If that's you, politely fuck off somewhere else.
+2. Any PR that moves GoToSocial in the direction of surveillance capitalism or other bad fediverse behavior will be rejected.
+3. Don't spam the chat too hard.
+
 ## Setting up your development environment
 
 To get started, you first need to have Go installed. GTS was developed with Go 1.16.4, so you should take that too. See [here](https://golang.org/doc/install).