ProxyBlock not quite right? and won't log....

I have Apache serving as a proxy,
but three things are not as I want:

1. I'd like it to log all requests

It logs requests from another machine, but
requests from the machine running Apache
are not logged.

2. I'm trying to use ProxyBlock to keep the children
out of certain places. It blocks OK if the request
comes from the server host, but not when it comes
from other machines on our subnet.

3. When it blocks request, can it be induced to generate
an error page instead of a timeout?