Ex-cons can't be permitted to vote because that's the slippery slope to letting serving inmates vote too. Colour me unpersuaded. This argument, however, leads one to wonder whether it is in fact possible for felons to "pay their debt to society"? And if they have not done so - as the denial of voting rights suggests they must not have done - then why are they being released in the first place? That, at any rate, would seem to be the logic of this matter. It's a grim and pitiless worldview.