Eh...I don't think of it as one in a trillion scans...but one in a trillion chance per image. I have something like 2000 pics. My wife, at least 5x that number. If we split the difference, and assume the average device has 5000 pics, that's already hitting false positives multiple times. Feel sorry for the first 5 to get their account banned on day 1 because their pic of an odd piece of toast was reported to the govt as cp.