Something tells me Stanford grad students are smart enough to see through cheap ploys like the one you suggest. If that's not the case, maybe Stanford doesn't deserve the clout it enjoys.

On the other hand there are plenty of laws which prohibit union busting and falsely fearmongering about unionization, yet corporations get away with it anyway, even when found guilty.

So perhaps it is a good thing unions are allowed to over-promise, it balances the power structure, if only a tiny bit.