There's no free speech on hackernews. People get moderated all the time! If hackernews can moderate its comments, then can't a conference moderate its speakers?
Big distinction -- people are moderated for their content on Hacker News, not off.
If this speaker makes a racial slur he'll likely be removed from the conference. Inside the conference (much like HN) they're free to limit his speech. However, as was mentioned in the article, the conference does not and will not judge speech outside the conference, much like HN does not (to my knowledge) ban users for offensive speech outside HN.
If this speaker makes a racial slur he'll likely be removed from the conference. Inside the conference (much like HN) they're free to limit his speech. However, as was mentioned in the article, the conference does not and will not judge speech outside the conference, much like HN does not (to my knowledge) ban users for offensive speech outside HN.