Not sure why anyone's downvoting this. If someone you've never met thinks that you have to put your life on the line, and therefore may possibly die, to further a cause - let them explain that cause. If they can't convince you it's more important than your life, then maybe it isn't.

See: Vietnam, etc.

Edit: My bad, I was thinking, "What's a good example of evil?" - Conscription should never be "necessary". The only thing conscription does is protect the status quo. Keep the upvote - it was an honest mistake on my part.