I agree with dws. This would be a good quest for you to write your own, or edit an existing, proxy.

It's not difficult to do. merlyn sent me some hairy-but-functional code that even handles SSL, and it wasn't more than a couple of hundred lines. With IO::Socket and HTTP::Request, you could put something together in a couple of weeks of light work.

Consider it a quest and a dare, from me to you. You'll learn a lot.

(And, as with most things in the monastery, I think we're better off with behavioral solutions for behavioral issues. Don't write anything you wouldn't want my mother to read, unless you have a really good reason.)