Does pulling that thing off the windscreen actually get you out of the fine?
I'm not in the US. Over here, they'd take a picture of your car, license plate and where it's parked.
Then, if it's on public ground you will just directly get a fine in the mail, or if it's private property, they sue you for trespassing.
And if you don't pay, they seize your property to settle what you owe.
On the other hand, on private property something like the barnacle would be illegal, since it would prohibit you from using your own property. Only police would be allowed to use similar devices and only on public ground.