So when I got on black ops 2 earlier I played until I was level 27. During that time I made my clan tag "pony".
However, I got off for a couple of hours. When I got back on my clan tag was now blank, I attempted to make it "pony" again and received 'clan tag denied due to prohibited text'.
I even tried stupid little workarounds, like p0ny and poni, and neither worked. All were banned.
Why are these clan tags banned? I can make my clan tag anything else.