In this case? Just demonstrate that the machines don't serve their stated purpose. Whether or not you think a measure like this is justified, the issue here is that the machines are so trivial to circumvent that they're a pure waste of money.

Those who support security measures like this ought to be angry at that, because it means money has been wasted that could've been used on measures that might actually work. Those who don't support measures like this ought to be angry because it means the privacy invasions are for nothing.

Either way, not much commentary is needed.