I'm also a young former JW, I am 23 now, I left when I was 17 from the JW's. I left because of doubting. I worked at a public library and because of the vast information at my fingertips began to research things for the sunday watchtower study. I remember the first thing that got me doubting was trying to find things about the 607 BCE destruction of Jerusalem, and finding NOTHING...all the sources said 587 bce. I knew the Society based the 1914 date off the 607 date, so if THAT was wrong then 1914 was also wrong.
It grew from there slowly, for a year. By the time I was 17 I had written a 100 page essay on the wrongs i had found about the society, and why I was leaving. I refused to speak to any elders unless they read my paper. All of them refused. They did not want to read ideas from apostates.
So then I went to college, and now I'm unfortunatley unemployed but supporting myself thru many irregular freelance work. So I guess technically I am not unemployed, but I certainly don't have a regular income.
I agree most people seem to leave because of being caught for offesnes like illicet sex or growing facial hair :) Out of the 8 or 10 youth at my congregation only 4 are still there. The rest DA'd themselves.
It's getting harder and harder to indocrinate people in this age of instant information.