It does not make it impossible. I just meant that if people know how STV works they should not be discouraged by low results of their preferred candidates in your exit poll. They still can vote for him without fear of having their votes lost.

Still one can look at poll results and be tempted to help some other candidate than his preferred one on the ground that the preferred one doesn't need his vote so much which can later backfire. So I definitely think this exit poll was not a good idea because it can affect real results. I just don't think in this specific case it is dangerous enough to be taken down. And I do see some positives too (already explained).

Still, maybe there should be some rule about exit polls next time?