I think it's a totally valid argument, so why wouldn't you allow it?
Why can't I post to a thread about some software that some people at least are saying is a rip-off? Why do I have to have 20 posts in order to reply to a thread? I have never heard of a forum rule like that.
It sure seems like you're just trying to totally control the conversations here. Do you think maybe you're trying to exert to much power? I know the WF is a powerful forum, but don't abuse the power and let us speak. Otherwise people will eventually just go elsewhere!