I'll look at it this way. I'm having a party, I'm buying tons of booze and I'm going to pay out the nose for some nice catering, maybe I'll pay for a DJ or a live band. I invite people to come have a good time with me, and they pay at the door, a small fee to gain entrance. Then, a huge bus of people shows up and sneaks in the back and starts drinking my alcohol, and enjoying my food, and before you know it, everything is gone and there's none left for the people who paid or myself, even though we paid for everything to be there, and the people who enjoyed it were not invited to my party and did not contribute. That's not okay with me. If they wanted to join, all they had to do was pay.
If they want to pay, but would risk doing so illegally, they're getting bounced by my bouncer.