Fix and add mock black box

ext/black_box.rb

@@ -0,0 +1,19 @@
+# The BlackBox is a component that we don't include in the source code.
+# It is used for our anti-spam code, which is not public.
+# If you're a spammer and reading this to try to break it, please leave us alone.
+# All you're doing is hurting a site that's trying to make the internet suck
+# less and prevent it from turning into an soviet-apartment-bloc social network Orwellian nightmare.
+# Also, we will very quickly detect and change the black box as soon as you figure out how to break it.
+# Please choose another site to go after, we implore you.
+
+class BlackBox
+  class << self
+    def generate(*args)
+      'derp'
+    end
+
+    def valid?(input, ip)
+      input == 'derp'
+    end
+  end
+end