diff --git a/r/gpg.md b/r/gpg.md
index a215974..d8beea0 100644
--- a/r/gpg.md
+++ b/r/gpg.md
@@ -23,12 +23,14 @@ Note the keyid and edit it
 
 ```
 gpg2 --edit-key KEYID
-adduid # here fill your name and details as asked
+adduid # here fill your name and details as asked no comments\*
 1 # to select the uid the first command generated
 deluid # to delete the uid which doesn't contain your name
 save
 ```
 
+*\* Comments are considered harmful https://debian-administration.org/users/dkg/weblog/97
+
 Then you are ready to publish the public key however you generally publish
 it, preferably in multiple places from where some recognise revokation
 certificates if the time ever comes.