No, of course not.
But if we returned to the situation whereby we could safely assume that almost everyone convicted deserved to be, and where there was far less crime anyway due to proper policing, then no one would be suggesting this. We could also have proper sentencing, and a proper regime for the far fewer people who were in prison.
That is the problem, in this instance, with the Lib Dems, the party that wants to give Ian Huntley the vote. They are quite good on civil liberties, but fail to see that that stand in incomprehensible and meaningless unless it is part of a package otherwise comprised of real policing, real sentences and real prison discipline. That last, at least, excludes the right to vote.