To dovetail into this conversation, the reason for re-instatement of the draft needs to be defined. Is it to win a war? If so, then re-enlist a mass of old, grumpy, retired military guys, and let them kick ass and take names later rules be damned - all's fair in love and war.
If the purpose of re-instatement is simply to increase troop strength, then every single, solitary, 18yr old should be lined up - regardless. No college deferment; no such thing as 4F. H e ll, drone pilots are joystick jockeys, and you can bet your sweet a$$ most 4F can handle a joystick.
