This is a public forum. I suppose once you post something here, it is analogous to that you make a speech or announcement in public - you bear both the benifits from that you convey information and ideas to others, and the obligation of being commented on and challenged. In a free-speech context, the right of making comments under the forum rules is common and equal to every participant.
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You may say I'm a dreamer
but I'm not the only one...