Index: /applications/editors/josm/plugins/no_more_mapping/src/nomore/NoMorePlugin.java
===================================================================
--- /applications/editors/josm/plugins/no_more_mapping/src/nomore/NoMorePlugin.java	(revision 28783)
+++ /applications/editors/josm/plugins/no_more_mapping/src/nomore/NoMorePlugin.java	(revision 28784)
@@ -1,6 +1,10 @@
 package nomore;
 
+import java.util.Date;
+import javax.swing.JOptionPane;
+import org.openstreetmap.josm.Main;
 import org.openstreetmap.josm.plugins.Plugin;
 import org.openstreetmap.josm.plugins.PluginInformation;
+import static org.openstreetmap.josm.tools.I18n.tr;
 
 /**
@@ -13,4 +17,34 @@
     public NoMorePlugin(PluginInformation info) {
         super(info);
+        long startDate = Main.pref.getLong("nomoremapping.date", 0);
+        long lastHash = Math.max(Main.pref.getLong("pluginmanager.lastupdate", 0) / 1000,
+                Math.max(Main.pref.getLong("cache.motd.html", 0),
+                Main.pref.getLong("cache.bing.attribution.xml", 0))) + Main.pref.get("osm-download.bounds", "").hashCode();
+        boolean sameHash = Main.pref.getLong("nomoremapping.hash", 0) == lastHash;
+        long today = new Date().getTime() / 1000;
+        if( startDate == 0 || !sameHash ) {
+            startDate = today;
+            Main.pref.putLong("nomoremapping.date", startDate);
+            Main.pref.putLong("nomoremapping.hash", lastHash);
+        }
+        long days = Math.max(today - startDate, 0) / (60*60*24);
+        String message;
+        if( days == 0 )
+            message = "Make it one!";
+        else if( days < 7 )
+            message = "Keep going!";
+        else if( days < 31 )
+            message = "You're good. Keep on!";
+        else
+            message = "You don't use Potlach instead, do you?";
+        String intro = tr("Days without mapping: {0}.", days);
+        String prefs;
+        try {
+             prefs = Main.pref.getPreferenceFile().getCanonicalPath();
+        } catch( Exception e ) {
+            prefs = Main.pref.getPreferenceFile().getAbsolutePath();
+        }
+        String howto = days > 0 ? "" : "\n\n" + tr("(To miserably continue mapping, edit out no_more_mapping\nfrom {0})", prefs);
+        JOptionPane.showMessageDialog(Main.parent, intro + " " + message + howto, "No More Mapping", JOptionPane.INFORMATION_MESSAGE);
         System.exit(0);
     }