This was MTG's argument at the time of her about-face on the subject.
There are people who live very mediocre lives and who spend their free time poring over these videos in order to identify people and submit names to the feds.
Everyone assumes that because the feds have cell phone information, air travel details and ATM transaction details that they can arrest who they want. But the info they have is not as precise as the info they need (a picture of someone at a particular location). It's the video that people are using to identify individuals; the electronic footprints are the supporting documentation.
I think it’s a valid concern.