Is talking about someone's cross thread comment/opinion...
...considered naming&shaming or otherwise rule breaking (if it is clear who you are talking about)?
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If an older opinion/comment is relevant to something in the current discussion (even if it is negative)?
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If it is not specifically relevant to the topic, but used as indicator that misunderstandings/agreeing/disagreeing/certain characteristics of the person's opinion have happened before (for whatever reason)?