> When disagreeing, please reply to the argument instead of calling names. E.g. "That is an idiotic thing to say; 1 + 1 is 2, not 3" can be shortened to "1 + 1 is 2, not 3."
from the site guidelines. Granted, this was in reply to an article rather than another commenter, but I think the principle is the same.
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The way I see it, "rolls eyes" is a violation of
> When disagreeing, please reply to the argument instead of calling names. E.g. "That is an idiotic thing to say; 1 + 1 is 2, not 3" can be shortened to "1 + 1 is 2, not 3."
from the site guidelines. Granted, this was in reply to an article rather than another commenter, but I think the principle is the same.