--- emerge	2003-07-25 16:30:40.731067720 +0100
+++ emerge.new	2003-07-25 16:30:52.103338872 +0100
@@ -1916,6 +1916,12 @@
 
 # "update", "system", or just process files:
 else:
+	if myaction in ["system","world"]:
+		print
+		print red("*** WARNING ***")+" : RUNNING EMERGE -u/U",myaction.upper(),"BLINDY CAN IMPAIR YOUR SYSTEM."
+		print red("*** WARNING ***")+" :",myaction.upper(),"UPDATES SHOULD BE SPLIT INTO LOGICAL SEGMENTS;"
+		print red("*** WARNING ***")+" : LOOK OUT FOR IMPORTANT INFORMATION, AND TEST AS YOU GO."
+
 	favorites=[]
 	syslist=getlist("system")
 	if ("--pretend" in myopts) and not ("--fetchonly" in myopts):