That's exactly what some lawmakers in the Republic of Ireland are proposing: make it a crime to share news known to be incorrect.  

Enforceable? Not clear how, exactly, but it might dampen the enthusiasm of commercial "bot farms" looking at opportunities for mischief in Ireland?

Friends on Twitter who have been hounded by bots - automated accounts programmed to overwhelm or intimidate outspoken sources - say that listing Germany as their location sends the fake feeds scurrying. Germany as very strict hate-speech laws. 

Ireland already has tough defamation laws, and fake news so far has not been a major political problem, but it's an interesting approach to prophylaxis.