Think of it thisway... on forums like this - people will list a lot of details about the mods on there cars that they dont tell the average joe on the street. So - why give people a way of tracking you down... Sorta the same as not using your real (or full) name on the net.
I know that all my neighbours will recognise my car, but none of them will know anything about it. One neighbour saw my car in a magazine, and came over to ask me about my car. He had no idea I had done anything over than the exhaust (its loud).
Another thing to consider is that people from insurance companies will look at these sites. And I am pretty sure that most people dont list ALL the mods they have done, on there insurance policies. (I havent told about my new springs)
FPV - Tickford Club of NSW