diff --git a/src/manip.rs b/src/manip.rs
index 60d61a7..9a48b61 100644
--- a/src/manip.rs
+++ b/src/manip.rs
@@ -119,6 +119,8 @@ impl MergedLimitList {
         for item in self.hostmap.into_iter() {
             let (block_trust, mute_trust) = item.1.normalize(self.trusts);
 
+            // TODO What should the behavior be when an instance is blocked or
+            // muted by most instances, but neither rises above the threshold?
             if block_trust >= block_thresh {
                 block_output.push_str(&(item.0.clone() + "\n"));
             }