The analogy that someone who supplies toilet paper is guilty for what their customer does is not fitting here. Let's say I am paid and entrusted to watch and protect a herd of sheep. A guy pays me $150 each time to come over and have some pleasure with those sheep many many times. I did not do the thing myself, but I certainly know what is going on and profit from it. I am not a good person, and you should not entrust me with your sheep.