I'm afraid we have some cars driving around like that too, mostly Volvo's I think.

They were featured in a Belgian tv-show but many speeding charges were dropped because the presence of the cameras violated the right to a fair trail of the suspect

If it's any consolation: at least the foreigners don't loose their license as easy as the Belgians amongst us...

Before you get any wrong ideas of me, in the humble 5 years that I drive around (good for some 140.000 km, mostly in Belgium, but also in Germany, France, Luxembourg, ...) I have never had an accident or been caught speeding (except for one time in Germany were I hadn't seen the speed sign, never got a ticket tough). So I don't encourage speeding or something like that, but in some cases the speed limits should be a little bit higher. I often return from my GF at night, it's a 1h30 drive on highways. 120 kmh is ridiculous then, especially when there are 3 lanes...

Enjoy your upcoming stay in Belgium