Felons voting? The next thing you know is dead people will be voting.
Oops, they already do.
Felons? It varies from state to state, but nearly every state restores felons right to vote. Some as soon as they are released from prison, others not until after probation or parole is completed. But in nearly every case felons regain their right to vote.
See wikipedia page.
SDS has a 1960s entry and a 2006 entry:
http://en.wikipedia.org/wiki/Students_for_a_Democratic_Society