This is a great effort. I help companies defend themselves from lawsuits involving nonsense patents regarding the stuff that I happen to know a bit about. One thing that might be done to help concentrate the effort where it has the most effect is to find out about the actual lawsuits filed by the trolls and then to prioritize those.
It's great to go after all patents filed by some troll, and that needs doing, but for the parties that are being sued by trolls specific action on specific patents would be far more beneficial.
Most of the patents litigated today were filed quite a while ago and if we don't concentrate on finding the prior art that might help a party sued under those particular patents it might well get lost. So concentrate on the patents that are actively litigated first, then concentrate on the patents that can still be easily squashed and then work from the oldest to the newest.
I realize that's a tall order but this is imo the best way to prioritize this kind of work. The main reason for the prioritization like this is that patents are filed in a system that does not forget, prior art is not filed in a central place and even stuff that happened less than two decades ago can be almost impossible to locate any proof of that will stand up in court. So older stuff should get priority.
Incidentally, Joao Controls is still on the warpath with their bogus live video patents.