Yeah it's an interesting discussion but it's kind of all over the place. I think the word 'Artist' was used in the first place and that is a very definitive thing. For me, there is a very big difference between an Artist and a Celebrity.
If you want to have the Artist/Ethics debate then the first thing you should consider is that many artists are, by their very nature, kind of peculiar people - not to say that all artists are perverts or degenerates, but that they are more inclined to go their own way when it comes to personal tastes or prejudices. Many many people who are considered famous artists today had very unwholesome proclivities that would probably be considered shocking or even repelent by today's standards. They didn't necessarily broadcast these traits - in fact many tried to hide them and some were persecuted for them even in their own time, but even with all of this, somehow their ART has withstood the test of time.
If you wanted to dispense with anyone who was accused of being a Pedophile, for instance, you would be discarding some pretty heavy hitters. Would you consider Lolita any less of a masterpiece of fiction if you knew that Nabokov very likely was a pedophile? It's definitely a personal choice to say 'I will not support this'., but if you actually read the book and see how Nabokov himself is struggling with the topic at hand, daring to make Humbert Humbert both sympathetic and repugnant at the same time, well that is what great art is - looking at the world in new and different ways - challenging your preconceptions. Plus, despite his proclivities, the man was just a genius writer.
On the other hand, if you're talking about celebrities - whether anyone should hold these people to a higher standard, it all seems very ridiculous - they are given money hand over fist for doing very little and encouraged to live as decadently as possible, but then, at the first whiff of scandal, we're supposed to reject them utterly until they find the Lord or commit to some higher standard. It's very difficult for me to take any of it seriously because these are not, for the most part, serious people. They're entertainers and, as such, are fairly disposable and interchangeable.