When your car gets stolen, suddenly nobody can access the data.
Are there any coordinated efforts for widespread scrubbing or removal of these parasitic devices?
On the "coordinated efforts" front, some anecdata:
Three separate posts on Craigslist in the Community section about Flock Cameras, trying to increase local awareness. Posted to two different cities, various posting iterations (e.g. with links / without, pics / no pics, etc.). All appeared to post fine when entered, but never saw the light of day and were marked as removed within a few minutes.
Any other subject: posts fine.
Try it yourself and see what you get.
When your car gets stolen, even with camera data, the police will not do anything.