This is not about data analysis. This is about justifying oppression. And if it comes to "we have found you all to be dangerous" the conclusion is "we need to oppress you all"
I think the point of big data is to collect enough information to extrapolate other qualities about whatever you want to know, so if everyone is on the list then you have no patterns to go off of besides "on Earth" or "in X country".
Side comment: if 99% of people were on the list, the the govt could just oppress everyone with a 99% accuracy rate. It's entirely possibly they could pick a proportion drastically lower than 99%
Area 51 : Naruto run means they can't catch us all :: List of people that dislike insurance companies : Knowing that gov't jobs are gonna be cut to the bone for crypto scams and GOP pocket lining means they can't monitor us all