let people think what they want...screw 'em!
There are plenty of smart people in the country, and there are even more ignorant ones. It's best to leave them alone.
And if you want a good car bulletin board, www.impreza.net
is a great one. It used to be the I-club, but weird things happened, so the name has changed. But it's the same place, and it's one of the most mature boards on the internet.