Automating the parking domain process

This is a curiosity question.

Has anyone come across a way to automate, parking a domain? I have Domain mapping set up, properly. Working just fine. I must manually park a user's domain, using cPanel, when they submit their domain to be mapped. I can see how this could get ugly. Especially when you acquire quite a few hundred or more domains that are mapped and then someone leaves the system and you need to "clean house" so-to-speak.

Does Edublogs do this manually?