There is a mens rea element though isn't there? If you post this with the intent of preventing people from voting versus posting something you think is factual

There is a mens rea element though isn't there? If you post this with the intent of preventing people from voting versus posting something you think is factual versus posting something with the intent being to make a joke. The first would be illegal, the second wouldn't, the third maybe (if you had reason to believe that people would interpret it as being factual prior to your posting it).