The statement 'New favorite insult: that guy is acting like a total shmusk' accompanied by an image of a sign displaying 'www.shmu.sk' does not constitute public discourse. It appears to be a casual or humorous remark rather than a substantive engagement with public issues or policies. The term 'shmusk' is presented as an insult without context or explanation, and the image of the sign seems to be used to visually represent the term rather than to discuss a societal issue.