I don't know why they single out people like that.
It only creates hate.
Everyone that isn't a vegan is a part of the animal exploitation.
However most people are good-hearted. The reason that they partake of animal exploitation is that they from childhood has been taught and disconnected to the animals.
If we want to encourage artists to become vegan, we shouldn't name them like this, but send them messages of love and compassion showing them that it is unethical to partake of oppression.
I recommend this: http://www.youtube.com/watch?v=oLgGnP0pWzM