We have two issues here, Blocking said IPs in a reliable simple method.
* Thought would be something like torblock that just downloads the list on
a daily/weekly/whatever schedule
* can provide the blocked users information on why they are blocked and
appeal process for valid users (ipblockexempt)
Two: A method for reporting, confirming and listing said sources.
* The easiest method that I know of would be a category based system with a
bot/script that compiles a complete listing of said pages in the category
on a regular basis.
* Using a category system enables a more fulidic process, reduces edit
conflicts and provides several other options.