Looking at the rugged end of LCD technology to vandal proof systems designed for applications such as information terminals; specifically outdoors ones and industrial display monitors where the harsh environments can be unforgiving to less sturdy materials.
Anyway, here's a demo of a vandal proof screen:
Not really pushed but lets have a look at how hard the materials used to protect the screens are:
Using a 42kg iron weight, that's packing a lot of punch. Looking at another side of vandal proof design, these guys have a look at how vandal proof stuff hold up in the real world: