- Warning: this comic occasionally contains strong language (which may be unsuitable for children), unusual humor (which may be unsuitable for adults), and advanced mathematics (which may be unsuitable for liberal-arts majors).
On September 12, 2016, the comic 1732: Earth Temperature Timeline was published and garnered attention from a much wider audience compared to other xkcd comics. Four hours after its release, the warning, along with the previous footnote, were both removed from the site. While a new footnote was added 22 days later, the warning never came back. This new footnote did not include a reinstatement of the original warning message. The removal of the warning and the footnote was likely a result of the comic's sudden surge in popularity, to ensure that new fans were not deterred by the messages.