I, too, am one of those who took a leave of absence from the board, for good cause, I thought, and returned. A year seems about right. And perhaps, rather than "kill off" an inactive account, there could be an intermediate state into which these identities were placed, for another time, and from which they could be resurrected.

P.S. Somehow, that image from the movie Logan's Run, where the people float up into the ceiling and are vaporized, keeps coming to mind.