You do. On the internet. An increasing amount of people are getting their (fake) news now exclusivly online via "alternative" news sources like RT. Banning one of those sources on television will just mean further entrenching of those people. ("see, they don't want the truth to spread" ...)

" I'd be happy if there were more money to fund school and lessons for children to understand how those fake news work."

And aside to lots and lots of crap in the curriculum, there would be enough school time avaiable to teach more of criticial information analysis and media skills. But partial banning of one source seems like the more comfortable solution. Except that this might really hurt us in the long run, if the next source that will be banned, won't be enemy propaganda source, but just a legitimate critical newspaper for example. But secret service will say the enemy funded and influenced them, so off they go.