Depends. If it's a severe one and needs to definitely have an apology, then one should do it if they honestly didn't mean it. Misinformation can be deadly and spread whether or not its done intentionally or anything else. Instead of spreading misinformation, people should be helping and, if needed, expose the right people at the right time. If it's better not to say anything, then don't, but not everyone will follow the rules. So there is a great responsibility, especially casting into the unknown, but getting punished for it equally is a different story.