I think most of the military vote has already been prevented. The Obamilitary made a point of not getting ballots to the troops in time.
I have a young 22 yr coworker who has 2 friends on active duty who say no one in their companynhas received any absentee ballots. When I was in the Army I had my mom in NY forward my absentee ballot that i had sent to my home address. I cast my first Presidential vote for Ronaldus Magnus in 84.