In Switzerland they have a similar system but with people's car registrations - you look up the car reg and you get the owners name and address. Seems 'road-rage' incidents are very low there. . .
I don't have a problem with G-INFO. There is, perhaps, an argument that it should be restricted to registered users (as in the the AIS website or the MET office site) but at the end of the day it's a very useful tool. I can think of more than one incident on these boards where it has been used to great effect in order to contact and have a quiet word with someone who was doing something 'rather silly' rather than go through the official channels. . .
BH