Same author talked about adversarial license plates that trick these cameras with a sequence of black blocks, discussed here in original form [1]. He is interested in breaking both the plate detection (ideal) and character recognition (good). The examples are pretty cool looking.
Get it while it's hot, cuz it's already illegal in some states, and will be in more soon!
You will be tracked and you will be happy about it.
In most countries, this is prohibited by law. While it might be interesting from a technical perspective, it does not help in practice.