Audience member notes obfuscation can still leak identity via counts and outliers (e.g. a caretaker linked to 7 children remains identifiable as the largest family even if individual fields are faked) and asks whether the team randomly deletes/adds records to mitigate this. Sergyenko: they didn't hit this specific leak but did encounter 'excessive data exposure' where therapists entered sensitive info into non-sensitive fields and it leaked into New Relic. Grazer allows custom strategies, so one could write a custom rule that randomly perturbs the number of children per family.