It has already happened. My first comment was removed, since my opinion that limiting debate to what one side deems acceptable is akin to the "Good Germans" who went along with the T-4 euthanasia program, which still - hundreds of posts into this thread - no one is willing to discuss on the rational, civil, etc. basis that the thread itself allegedly calls for.
Um, no, your first comment was removed because you implicitly called all the people asking for a return to civil discourse "nazis".
All the evidence available on this thread is that no one here is advocating censorship. Of course, if you think that a simple request that people abide by forum rules and not engage in name-calling and personal attacks is "limiting debate", then your mileage may vary.