I have pretty much given up... the whole fixed speed camera thing has totally demorilised me. :(
But seriously, I drive 10 kms from home to work, and I go through 3 intersections that have them. It's insane how many there are around now.
Unless I'm out on the highway or in an area I know really well, I keep below the limit now. It's just not worth it, 3 km/h over and that's $150 down the drain.
I already give enough money to the government, why should I give them more? I'll leave that to the people in the lasers and corollas who still try to drag at the lights and end up doing about 20ks over the limit by the time they are past me.
And I wouldn't risk countermeasures of any description. Not sure about how it is down here in Vic, but was reading a thing about the RTA in NSW, if they find a countermeasure device of any kind, it's an $1100 fine and 9 demerit points. Ouch!