Startup Idea : Forum software where user has more rights

Most forum software let's anyone comment on your threads, even if you don't like them to. A solution would be to develop forum software where threads are the private space of the OP and can be seen only by those he deems worthy and if in the case the user decides to allow everyone to see it or post in it, he can delete any post he doesn't like from since his thread is his space. Currently this functionality can only be done by forum admins or moderators, but I am proposing to allow this liberty to everyone. A kind of virtual private property. What do you think of this idea.?