Index: head/Mk/bsd.port.mk
===================================================================
--- head/Mk/bsd.port.mk
+++ head/Mk/bsd.port.mk
@@ -2040,6 +2040,10 @@
 
 # How to do nothing.  Override if you, for some strange reason, would rather
 # do something.
+# In general, however, DO_NADA is a relict of the past in the ports
+# infrastructure, and most of its usage has been removed. If you need to define
+# a target with DO_NADA, then there is a high chance that the ports
+# infrastructure should be fixed instead.
 DO_NADA?=		${TRUE}
 
 # Use this as the first operand to always build dependency.