Should Wikipedia discourage use of smiley Unicode code points in discussions?

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Wikipedia should discourage use of smiley Unicode code points in discussions

Pro

• Pro Those code points communicate no ideas that are part of rational argument-based discussion.
• Pro Disregarding the above point for the sake of argument, even if one wants to convey emotion, one can use words or non-code-point smileys, such as "love", "oh my gosh", or ":-)" and ":-D".

Con

• Con Smileys add human touch.