diff --git a/hgext3rd/tweakdefaults.py b/hgext3rd/tweakdefaults.py
--- a/hgext3rd/tweakdefaults.py
+++ b/hgext3rd/tweakdefaults.py
@@ -53,6 +53,13 @@
 
     # output new hashes when nodes get updated
     showupdated = False
+
+    # Show developers warning for using discouraged features.
+    #
+    # For example, 'x:y' in revsets shows revision numbers between x and y,
+    # both inclusive. Usually, this doesn't correspond to any meaningful
+    # interpretation of the repo and is therefore, discouraged.
+    develwarn = True
 """
 from __future__ import absolute_import
 
@@ -126,11 +133,12 @@
     options.append(
         ('d', 'dest', '', _('destination for rebase or update')))
 
-    # anonymous function to pass ui object to _analyzewrapper
-    def _analyzewrap(orig, x):
-        return _analyzewrapper(orig, x, ui)
+    if ui.configbool('tweakdefaults', 'develwarn', True):
+        # anonymous function to pass ui object to _analyzewrapper
+        def _analyzewrap(orig, x):
+            return _analyzewrapper(orig, x, ui)
 
-    wrapfunction(revsetlang, '_analyze', _analyzewrap)
+        wrapfunction(revsetlang, '_analyze', _analyzewrap)
     try:
         rebaseext = extensions.find('rebase')
         # tweakdefaults is already loaded before other extensions
diff --git a/tests/test-tweakdefaults.t b/tests/test-tweakdefaults.t
--- a/tests/test-tweakdefaults.t
+++ b/tests/test-tweakdefaults.t
@@ -1,3 +1,4 @@
+#testcases develwarn.true develwarn.false
   $ . "$TESTDIR/histedit-helpers.sh"
 
   $ cat >> $HGRCPATH << EOF
@@ -10,6 +11,13 @@
   > updatecheck=noconflict
   > EOF
 
+#if develwarn.false
+  $ cat >> $HGRCPATH << EOF
+  > [tweakdefaults]
+  > develwarn = False
+  > EOF
+#endif
+
 Setup repo
 
   $ hg init repo
@@ -744,6 +752,7 @@
   
 Test that developer warning is shown whenever ':' is used implicitly or explicitly
 
+#if develwarn.true
   $ hg log -G -T '{rev} {bookmarks}' -r '0:2'
   devel-warn: use of ':' is deprecated
    at: *tweakdefaults.py:* (_analyzewrap) (glob)
@@ -753,6 +762,17 @@
   |
   o  0
   
+#else
+  $ hg log -G -T '{rev} {bookmarks}' -r '0:2'
+  o  2
+  |
+  o  1 master
+  |
+  o  0
+  
+#endif
+
+#if develwarn.true
   $ hg log -G -T '{rev} {bookmarks}' -r ':2'
   devel-warn: use of ':' is deprecated
    at: *tweakdefaults.py:* (_analyzewrap) (glob)
@@ -762,6 +782,17 @@
   |
   o  0
   
+#else
+  $ hg log -G -T '{rev} {bookmarks}' -r ':2'
+  o  2
+  |
+  o  1 master
+  |
+  o  0
+  
+#endif
+
+#if develwarn.true
   $ hg log -G -T '{rev} {bookmarks}' -r '0:'
   devel-warn: use of ':' is deprecated
    at: *tweakdefaults.py:* (_analyzewrap) (glob)
@@ -771,6 +802,16 @@
   |
   o  0
   
+#else
+  $ hg log -G -T '{rev} {bookmarks}' -r '0:'
+  o  2
+  |
+  o  1 master
+  |
+  o  0
+  
+#endif
+
 In this testcase warning should not be shown
   $ hg log -G -T '{rev} {bookmarks}' -r ':'
   o  2