diff --git a/docs/specification.rst b/docs/specification.rst
index 5b044459e2aa0ef957697c560b3401ae345608f8..d8189996cf4c28def9e92cdb9d38b24f0a57f8af 100644
--- a/docs/specification.rst
+++ b/docs/specification.rst
@@ -1972,6 +1972,10 @@ victim would then include in their view of the chatroom history. Other servers
 in the chatroom would reject the invalid messages and potentially reject the
 victims messages as well since they depended on the invalid messages.
 
+.. TODO
+  Track trustworthiness of HS or users based on if they try to pretend they
+  haven't seen recent events, and fake a splitbrain... --M
+
 Threat: Block Network Traffic
 +++++++++++++++++++++++++++++