I saw this is quite under the focus since it's going to be added to some common roms.
I have a biased idea on having a killswitch installed on my phone, so i'd avoid using one of these roms by now.. but that's my problem.
Now, i see a big problem in this project: it misses a charter on what will be accepted as a blacklisted package, and a code of conduct on how proposed changes will be evaluated and accepted.
I think some warranty rules are essential if you plan to have this accepted by people.