No, it's not.it is impossible to prove that something doesn’t exist
I mean did they not teach you in school that maths thing where you assume something to be true, and then make calculations base on it until it leads to non-sense, thus proving it's not true?
Analytics like these are FB's whole business model...Anything initiated from within is unlikely to be real examination.
Now, they could be lying about what they actually found, but it's silly to claim they aren't examining the issue for real...