Security warnings in comments

examples/src/UdpExamples/MulticastUdpChatKeyboardSender.java

@@ -16,7 +16,7 @@ import java.util.logging.Logger;
  * home network) even if one or both machines are connected via a 
  * <a href="https://en.wikipedia.org/wiki/Virtual_private_network" target="_blank">Virtual Private Network (VPN)</a>.
  * 
- * Privacy note: this sender advertises your user name as part of the multicast packet message
+ * Privacy warning: this sender advertises your user name as part of the multicast packet message
  * 
  * @author mcgredo
  * @author brutzman@nps.edu
@@ -90,6 +90,7 @@ public class MulticastUdpChatKeyboardSender
             byte[] buffer = baos.toByteArray();
             DatagramPacket packet = new DatagramPacket(buffer, buffer.length, group/*, DESTINATION_PORT*/);
             
+            // Security warning: this application reveals your user name
             String   userName = System.getProperty("user.name");
             String newMessage = new String(); // from user via keyboard