Please, someone tell me...

What are the good and honourable reasons leftists/socialists would be against secret ballots anytime?

Secret Ballots May End in [American] Union Elections If Obama Becomes President.

...[U]p until now, a worker could placate union supporters and sign a statement saying that he wanted a union and then vote against the union when he was protected by the secrecy of the voting booth.

While the Bush administration promised to veto the so-called “Employee Free Choice Act,” Obama has made his feelings about the legislation very clear. Last year, Obama promised, “We will pass the Employee Free Choice Act. It’s not a matter of 'if'; it’s a matter of 'when.' We may have to wait for the next president to sign it, but we will get this thing done.”

I think the reason is that union activists/supporters want their intimidation targets more easily identified, but if anyone has a better, non-thuggish reason, I'd love to hear it.

After all, maybe I just don't understand.