Yeah, it's difficult to judge "bad people" when you don't know them. We all probably listen to the music of, watch the movies of, watch the TV shows of people who we have no idea what they're getting up to that might sicken us?
So, judging adulterers etc you'd really not be listening to an awful lot in the end.
But when it comes to known crimes like Ian Watkins, yeah, knocks me sick and I just can't.