Its a hoax message. No such provision exists. Under 49-O, you are registered as a voter but you inform that you do not want to cast the vote and an entry is made accordingly. There is no rule which talks about the second part - getting the winner invalidated... Its an appealing idea, but sorry, will have to wait till someone puts up an amendment to the clause. As of now, just hope like hell that some sane chap is available as a candidate..