> there isn't much point in being in a union if the union unconditionally accepts orders from your employer.
That's BS - nobody talking about accepting every order forever, whatever it is. The matter in question here is completely common and reasonable security measure. To refuse it just to be obstinate and play the power game is childish and pointless. Exactly what one doesn't want in a union - preferring power games to the benefit of the workers - who, I presume, would want an honest election - and an election that can be proven to be honest.
> there is absolutely no evidence of impropriety at any level here
So what? There's no evidence I am a terrorist, but I have to show ID and go through the security when I fly (or enter a court building). There's no evidence I am not paying taxes, but I have to submit my tax return (and sometimes undergo audit - without any evidence I cheated!). There's no evidence I am an illegal immigrant, but I still have to show my ID when passing the border. There's no evidence I am a crappy driver, but I still have to get a driver license, by passing tests. There's no evidence I am a criminal, but I still have to show ID and submit to a background check if I want to buy a firearm. There's no evidence I stole my credit card, but I still have to type in the secret code in the form. There's no evidence I am impersonating somebody else on HN, but I still have to type the password when I am logging in. There's no evidence somebody is breaking into my house, but I still have lock and keys (and cameras).
I could continue for hours. There are thousands of cases where security measures are taken without evidence of somebody's personal misconduct that already happened. That's how you make sure the probability of misconduct is very low - by taking measures before it happened, not after. Somehow in this particular case it's not clear - despite widespread usage of security cameras otherwise, that could have hinted you that using security cameras does not have proof of misconduct as prerequisite - in fact, the presence of the cameras is usually the prerequisite of obtaining the evidence.
> Amazon's demands amount to handwringing and FUD
There was no base for FUD until people started refusing common security measures - and then there is, if they don't plan to cheat why they are so against the common security measures? If there's no misconduct, why they are so keen to ensuring there could be no possibility of having any evidence of it?