Some of us a) don't have cameras, or ready access to cameras, or 2) don't particularly want to put pictures of our cars up, or c) don't have an M42 yet/anymore.
None of this applies to me, although I have yet to get a decent picture of the car up. However, I don't think we should block anyone from posting just because they choose not to put pictures up.
Next thing you know, you won't be able to post unless you have AIM, or run Linux, or... whatever.
I think having an interest in the car should be sufficient.