Go back further, and there's Bob Dylan and others of the 1960s musical revolution being told to stick to pop songs and stay out of world events.
The politicians, power-brokers and warmongers will always seek to undermine the opinions that run contrary to their narrative, and when those opinions come from someone in the arts or showbusiness it is easy to be dismissive.
But consider this ... Israeli Prime Minister Benjamin Netanyahu is in the United States trying to stall what might be termed a detente, even peaceful negotiation, between the US and Iran, while Roger Hearn, regional director for Save The Children, this week bemoaned the Israeli blockade which was stopping the rebuilding of Gaza and leaving thousands upon thousands of families living in ruins. "Don't follow leaders," Dylan advised.