Hide only posts later than the specified ones when banning a user

boards/admin.py

@@ -30,7 +30,7 b' class PostAdmin(admin.ModelAdmin):'
             ban, created = Ban.objects.get_or_create(ip=poster_ip)
             if created:
                 bans += 1
-            posts = Post.objects.filter(poster_ip=poster_ip)
+            posts = Post.objects.filter(poster_ip=poster_ip, id__gte=post.id)
             hidden += posts.count()
             posts.update(hidden=True)
         self.message_user(request, _('{} posters were banned, {} messages were hidden').format(bans, hidden))