Index: trunk/data/validator/deprecated.mapcss
===================================================================
--- trunk/data/validator/deprecated.mapcss	(revision 15435)
+++ trunk/data/validator/deprecated.mapcss	(revision 15454)
@@ -1802,2 +1802,11 @@
   group: tr("deprecated tagging");
 }
+
+/* #17984 */
+*[tower:type=anchor],
+*[tower:type=suspension] {
+  throwWarning: tr("{0} is deprecated", "{0.tag}");
+  suggestAlternative: concat("line_attachment=", "{0.value}");
+  fixChangeKey: "tower:type => line_attachment";
+  group: tr("deprecated tagging");
+}
Index: trunk/data/validator/geometry.mapcss
===================================================================
--- trunk/data/validator/geometry.mapcss	(revision 15435)
+++ trunk/data/validator/geometry.mapcss	(revision 15454)
@@ -96,4 +96,5 @@
 
 /* {0} on a way, should be a node */
+way[line_attachment],
 way[emergency=fire_hydrant],
 way[entrance],