Dear lord those are terrible! You just know some chav has said "oh you should be a model" to get his dick wet and they've only gone and believed him!

To answer the actual question, if you get your plates made with reflective backing and stand near enough square onto the plate it will be illegible. Sadly Gatsos tend to be slightly off to the side. Pavement mounted or Overhead Gantry.

The ONLY number plate device to work on both the normal image and the inverted negative image is the Specterguard. (not available in the UK for obvious reasons) I've seen these in real life and they are very very good.

Not sure I'd like to explain to the nice policeman why I have them fitted though.