Index: trunk/data/validator/deprecated.mapcss
===================================================================
--- trunk/data/validator/deprecated.mapcss	(revision 15496)
+++ trunk/data/validator/deprecated.mapcss	(revision 15526)
@@ -1819,2 +1819,11 @@
   group: tr("deprecated tagging");
 }
+
+/* #18267 */
+node[pipeline=marker],
+node[power=marker],
+node[cable=marker] {
+  throwWarning: tr("{0} is deprecated", "{0.tag}");
+  suggestAlternative: "marker=* + utility=*";
+  group: tr("deprecated tagging");
+}