I've been pretty lucky over the few years that I have been driving. I remember I got caught by 3 cameras in one journey when I was running late for a wedding and fortunately not one must have been active...
My main issue with cameras is that they don't really prevent speeding, they just displace it. How often do you see someone doing 40mph, slow down to 30mph as they go through the speed camera and then speed up to 40mph again afterwards? The camera prevented speeding for all of 50 yards. I think cameras are a good thing if used properly. However I'm more for people standing behind the guns. I know police officers who take a speed gun out, pull drivers, start writing them a ticket, then after gauging their attitude towards what they have done either continue to issue the ticket or rip it up and let them off with a stern warning, machines don't have discretion and I think this method is a lot more effective. If you get a bit of an ear bashing and that "fear" of being prosecuted and then let off, you may think twice next time.
I hope they do follow through with the idea of raising the limit on a motorway to 80mph though. I have never driven in Germany and whilst I know only sections of the Autobahn is unrestricted, does anyone know what their accident statistics are like? I wonder how many of their accidents are foreigners having a bit of fun rather than locals.