diff --git a/docs/supportedsites.rst b/docs/supportedsites.rst
index 49995ff1..2a1a1ed8 100644
--- a/docs/supportedsites.rst
+++ b/docs/supportedsites.rst
@@ -1,5 +1,7 @@
 Supported Sites
 ===============
+Unless otherwise known, assume all sites to be NSFW
+
 ==================== =================================== ================================================== ================
 Site                 URL                                 Capabilities                                       Authentication
 ==================== =================================== ================================================== ================
diff --git a/scripts/supportedsites.py b/scripts/supportedsites.py
index 5b4ba089..3d861104 100755
--- a/scripts/supportedsites.py
+++ b/scripts/supportedsites.py
@@ -237,6 +237,7 @@ def write_output(fobj, columns, extractors):
     # caption
     w("Supported Sites\n")
     w("===============\n")
+    w("Unless otherwise known, assume all sites to be NSFW\n\n")
 
     # table head
     sep = " ".join("=" * c[1] for c in columns) + "\n"