Username Blocking API Issue

I have found a MAJOR bug.

When a "rare" name is released people like http://chearful.ninja "block" them. Blocking is when you exploit the api so nobody can change their name to that name and only they can. It is not sniping. I know what im talking about. http://chearful.ninja/blocking explains it. Names such as "Leg" and "Slits" were both blocked by them. The name should be available but it is not for the public, only them.