I guess there are plenty of Leeds fans who have bought a ticket through the website before and get access to buying a ticket for the match. In fact, you could just probably go see the upcoming Plymouth match and then unlock your account for any further ticket purchases.
What I'm trying to say, there is no way for the ticket office to fully exclude Leeds fans from buying home tickets for this match.
If I get a ticket though, I'll buy you a pint before the match so you can see that I'm no Leeds supporter, lol.