With you Ewan. Let's take that a bit further. Three "stars":
Penn - socialist, activist, but impressive in that he now knows where South America is. Declared supporter of Iran, protested against the Iraq war, even though he knew nothing about it. Jumps on contentious issues for publicity and, let's face it, cash.
Morrissey - outspoken racist and anti-violence who turned to 'gangsta', took up boxing and hung out with a skinhead, called Jake. Developed a homoerotic obsession with violent morons and started wearing 'bling'.
Waters - caused the downfall of the world's greatest ever band and then tried to sue them when they carried on playing their own songs. Another musician who has repeatedly jumped on numerous political bandwagons. He wrote some great songs, but now has become a late-middle-aged meddler. He even wrote an album about it
Nobody gave them a voice in modern politics. Who cares what they have to say?