potential small group privacy examples, per #251 (#289)

index.html

@@ -784,6 +784,13 @@
 maps of popular running routes. In doing so, it revealed secret US bases around which military
 personnel took frequent runs ([[?Strava-Debacle]], [[?Strava-Reveal-Military]]).
 
+People's privacy interests may also be affected when information about a small group of people is
+processed, even if no individualized data is exposed. For example, browsing activity of the students
+in a classroom may be sensitive even if their teacher doesn't learn exactly which student accessed a
+particular resource about a health issue. Targeting presentation of information to a small group may
+also be inappropriate: for example, targeting messages to people who visited a particular clinic or
+are empaneled on a particular jury may be invasive even without uniquely individual data.
+
 When [=people=] do not know that they are members of a group, when they cannot easily find other
 members of the group so as to advocate for their rights together, or when they cannot easily
 understand why they are being categorised into a given group, their ability to protect themselves