Ah, okay. I kind of see what you mean Searcher. I agree with you that everyone should more or less have equal rights. However, I think you misunderstand the fundamental nature of the forums, as well as what this rule is really about.
Imagine for a moment that you own a huge house, and you invite thousands of guests into your huge house to have dinner and discuss philosophy. You're a kind-hearted and accepting individual, so you let absolutely anyone into your huge house, showing no discrimination of any kind. But then, one of the guests starts throwing their food at the other guests. They prevent proper discussion by shouting loudly and refusing to hear anyone out. And to top it all off, they start smashing your windows and lighting things on fire.
What do you do? You kick that person out. Not because they happened to be an orc, but because they are ruining everybody else's meal and discourse, and they are potentially about to cause harm to one of your other guests (and this most certainly can be the case in metaphysical groups as well).
This doesn't mean that you're going to kick all of the orc-people out of your house. No, those who have behaved well are still welcome.
You have also not taken away any of the fundamental rights of the individual you did kick out. They still have their right to free speech, and whatever else. They can throw food, shout loudly, and light things on fire in their own house, and maybe even at another party that happens to be a food-fight-fire-party. But they are no longer welcome to do so in your house.
If you are still having trouble understanding, I recommend that you try actually opening up your house to the world as in the example above. Some times you just have to live it to get it.
Also, I'm quite sure you are wrong about kobok.