HN's policy is that the title should be the same as the original article's title, unless it's misleading or clickbait, in which case a title may be constructed

HN's policy is that the title should be the same as the original article's title, unless it's misleading or clickbait, in which case a title may be constructed using representative wording from the article. If nothing else, the point of this rule is to avoid off-topic debates about the title. "Crack" doesn't appear in the Techcrunch article or title, so adding to the title on HN is against the guidelines, plain and simple.