diff --git a/management/commands/check_consistency.py b/management/commands/check_consistency.py
index 83fec96..5249723 100644
--- a/management/commands/check_consistency.py
+++ b/management/commands/check_consistency.py
@@ -23,10 +23,11 @@ class Command(BaseCommand):
         if options["sum_all"]:
             s = Note.objects.aggregate(Sum("balance"))["balance__sum"]
             if s:
-                err_log += self.style.NOTICE("LA SOMME DES NOTES NE VAUT PAS ZÉRO : " + pretty_money(s)) + "\n"
+                self.stderr.write(self.style.NOTICE("LA SOMME DES NOTES NE VAUT PAS ZÉRO : " + pretty_money(s)))
                 error = True
             else:
-                self.stdout.write(self.style.SUCCESS("La somme des notes vaut bien zéro."))
+                if options["verbosity"] > 0:
+                    self.stdout.write(self.style.SUCCESS("La somme des notes vaut bien zéro."))
 
         notes = Note.objects.none()
         if options["check_all"]:
@@ -42,19 +43,13 @@ class Command(BaseCommand):
                 .annotate(total=F("quantity") * F("amount")).aggregate(Sum("total"))["total__sum"] or 0
             calculated_balance = incoming - outcoming
             if calculated_balance != balance:
-                err_log += self.style.NOTICE("LA SOMME DES TRANSACTIONS DE LA NOTE {} NE CORRESPOND PAS "
-                                             "AVEC LE MONTANT RÉEL".format(str(note))) + "\n"
-                err_log += self.style.NOTICE("Attendu : {}, calculé : {}"
-                                             .format(pretty_money(balance), pretty_money(calculated_balance))) + "\n"
+                self.stderr.write(self.style.NOTICE(f"LA SOMME DES TRANSACTIONS DE LA NOTE {note} NE CORRESPOND PAS "
+                                                    "AVEC LE MONTANT RÉEL"))
+                self.stderr.write(self.style.NOTICE(f"Attendu : {pretty_money(balance)}, "
+                                                    f"calculé : {pretty_money(calculated_balance)}"))
                 if options["fix"]:
                     note.balance = calculated_balance
                     note.save()
                 error = True
 
-        if error:
-            self.stderr.write(err_log)
-            if options["mail"]:
-                send_mail("[Note Kfet] La base de données n'est pas consistante", err_log,
-                          "NoteKfet2020 <notekfet2020@crans.org>", ["respo-info.bde@lists.crans.org"])
-
         exit(1 if error else 0)
diff --git a/management/commands/compilejsmessages.py b/management/commands/compilejsmessages.py
index f36328e..c66686a 100644
--- a/management/commands/compilejsmessages.py
+++ b/management/commands/compilejsmessages.py
@@ -19,7 +19,8 @@ class Command(BaseCommand):
         for code, _ in settings.LANGUAGES:
             if code == settings.LANGUAGE_CODE:
                 continue
-            self.stdout.write(f"Generate {code} javascript localization file")
+            if kwargs["verbosity"] > 0:
+                self.stdout.write(f"Generate {code} javascript localization file")
             with translation.override(code):
                 resp = JavaScriptCatalog().get(None, packages="member+note")
                 if not os.path.isdir(kwargs["out"] + "/js/jsi18n"):
diff --git a/management/commands/extract_ml_registrations.py b/management/commands/extract_ml_registrations.py
index 1e8f472..afcd7cc 100644
--- a/management/commands/extract_ml_registrations.py
+++ b/management/commands/extract_ml_registrations.py
@@ -25,6 +25,10 @@ class Command(BaseCommand):
     def handle(self, *args, **options):
         # TODO: Improve the mailing list extraction system, and link it automatically with Mailman.
 
+        if options['verbosity'] == 0:
+            # This is useless, but this what the user asked.
+            return
+
         if options["type"] == "members":
             for membership in Membership.objects.filter(
                 club__name="BDE",
diff --git a/management/commands/make_su.py b/management/commands/make_su.py
index cab3c6f..692d43a 100644
--- a/management/commands/make_su.py
+++ b/management/commands/make_su.py
@@ -16,7 +16,11 @@ class Command(BaseCommand):
             user = User.objects.get(username=uname)
             user.is_active = True
             if kwargs['STAFF']:
+                if kwargs['verbosity'] > 0:
+                    self.stdout.write(f"Add {user} to staff users...")
                 user.is_staff = True
             if kwargs['SUPER']:
+                if kwargs['verbosity'] > 0:
+                    self.stdout.write(f"Add {user} to superusers...")
                 user.is_superuser = True
             user.save()
diff --git a/management/commands/refresh_highlighted_buttons.py b/management/commands/refresh_highlighted_buttons.py
index bcf53c4..fa73cb6 100644
--- a/management/commands/refresh_highlighted_buttons.py
+++ b/management/commands/refresh_highlighted_buttons.py
@@ -23,7 +23,8 @@ class Command(BaseCommand):
         for d in queryset.all():
             button_id = d["template"]
             button = TransactionTemplate.objects.get(pk=button_id)
-            self.stdout.write(self.style.WARNING("Highlight button {name} ({count:d} transactions)..."
-                                                 .format(name=button.name, count=d["transaction_count"])))
+            if kwargs['verbosity'] > 0:
+                self.stdout.write(self.style.WARNING("Highlight button {name} ({count:d} transactions)..."
+                                                     .format(name=button.name, count=d["transaction_count"])))
             button.highlighted = True
             button.save()