When has prison deterred anyone from anything? If you think you're going to get away with it (like living illegally in the States), then you're probably going to do it. Add to that the desperation of an entire group of human beings who don't want to live in the harsh conditions of their home country. They're willing to keep doing this, and the threat of prison means nothing to them. Can we stop saying prison is a deterrent? It's a penalty. That's all. It's not rehabilitation. Also, who's going to pay for all these prisoners? I don't want my taxes going to that.