Jan, here's a fun idea to consider: ask them at the beginning of the interview how much time they have available to speak with you. Then, when they claim they're out of time 5 minutes in and they told you 15 minutes, they'll need a different excuse. :)
I already made another comment praising Jan, but I want to add to that, I think what he does is incredibly brave and I can't imagine what it takes to go out and do what he does, let alone to do it as well as he does. He's basically waging a one-man war, that takes a lot of heart and nerves of steel.
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