Almost everything depends on perspective. What one person says, someone else could completly take out of hand just because of there perspective on the topic. It's like someone selling guns, it's nothing different from selling, say, car parts or radios. It's the same really. You get up, get on the phone, you meet you clients, discuss a fair price, make a delivery, recieve payment. It's what men have been doing for thousands of years, trading one thing for another. But if one attaches morality to it, makes it evil. That's just there perspective on the topic.