If we start to question artists morally then very quickly a lot of significant work and artists should 'abandon the scene'. From Lennon to Wagner, Ferdinand-Celine to Bill Murray, Polanksi via Woody Allen, to Chris Brown to Kanye (probably the mildest on this shopping list).
What's different this time around is that the pop stars' life details are part of their shtick more than ever before. Chris Brown is a 'bad boy', this is how he's packaged. What is of concern is that, this kind of behavior is being normalized in society at large when it's reigning a significant portion of the pop media cycle.
The common criticism with Lennon was that he was a bad husband and father in his first marriage -- but this part of his life was never publicized, indeed, it was actively suppressed by his PR managers. And for whatever it's worth, Lennon was in the process of making amends in his final days anyways.
