IDEA: additional car window protection for parking cars

Hi,
  it had to happen. My car got broken into (again) through the side window whilst parking in the disabled parking area at a hospital no less. It was a break and grab from what I see. So what makes it so easy to do this ? The window is designed to scatter for security purposes. Naturally, one cannot make a car into a rolling safe but it appears a bit too easy with modern tools to break in. The tools for the "trade" are radically cheap.

  The idea is to use a fibre curtain inside that not only protects the glass from falling into the car. It also delays the intrusion into the car significantly. The curtain or fabric should be automatically rectracted from all windows when driving. Upon locking the car the fabric will be pulled up (down?) into position similar to shutters and held on all four sides. This will also provide reduced visibility to the inside of the car.

  In order to gain access after breaking the window an intruder would have to cut through the wobbly fabric strengthened with some form of metal fibres to make that slower. Alternatively, the truder would have to dislodge the fabric held on all four sides. As the fabric does not need to fit snug to the window it may be possible to inset the sides into a groove to decrease access.

  The protection is only needed for parking and thus should not hinder access by the emergency services.