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

Pro

 * Those code points communicate no ideas that are part of rational argument-based discussion.
 * 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

 * Smileys add human touch.