I signed up for both O'Leary and Bernier's websites to get a feel for the candidates. While I haven't made my decision on who to support (I bought a $30 membership to vote) I do find the accusations very troubling. 
Again, I have no axe to grind here but if they are true its a big deal. For those of you who have not voted in a party leader convention, it does not take many votes to win. A few hundred or even dozen fraudulent voters could swing the vote and that is not right.