I don't know. An app that only people with direct interest in this matter would use regularly, seems like a pretty convenient way to mark people of interest, no?
Not even in a sci-fk distopían way. Imaginet: TSE sees the app on your screen as you're powering it down in line? BOOM baby, alligator town.
No?
As much as I trash DeCeNtrAlIZaTiOn, maybe THIS is when you actually need DeCeNtrAlIZaTiOn, to protect all participants
Citizenship? I think you mean Party Membership.