I think Skynet would've been more successful if they had cloned a hot chick, gave her AIDS, and then sent her back in time to sleep with John Conner. =)
I love how dark that idea is. However it begs the assumption that the noble John Conner is just like the rest of us and would do some random hot chick who happened to crash his bivouac.
Well, John did kiss the love of his life in a friend's basement before T2 turned up. I assume he's part of the got-her-pregnant-before-I-turned-18 crowd.