Since this thread has stayed politely on topic, more or less, I'll share my opinions:
I am not against compusory service, but the magnitude of such an effort, military or Americor-like, would be staggerring and the cost staggerring-squared. The military really doesn't need that many folks, either...technology has allowed downsizing in many warfare areas. But that's a topic for another post.
The link below gives a picture of the total force structure (not including reserves) that has remained steady at around 1.5M people, a ridiculously small percentage of the total population of the US, happily.
http://web1.whs.osd.mil/mmid/military/miltop.htm
Concerning the quality of recruits, my experience as a naval officer the past 23 years is a study in ying and yang: I have had the privaledge of leading some of the finest young men and women imaginable, truly bright and wonderful kids using the navy has a tool for a better life. I can cite literally hundreds of examples. I have also had the challenge of caring for some less than stellar folks...but I had the exact same experience running a rafting business during summers in college.
If my son or daughter decide to serve, my only requirement is that they do so with honor.