Improve vulnerable people wording and links (#402)

Co-authored-by: Nick Doty <[email protected]>

index.html

@@ -786,10 +786,12 @@
 
 ## Vulnerability {#vulnerability}
 
-Sometimes particular groups are classed as “vulnerable” (e.g. children, or the
-elderly), but anyone could become privacy vulnerable in a given context.
+Sometimes particular groups of people, such as children, or the elderly,
+are classified as [=vulnerable people=]. However, any [=person=] could be vulnerable in
+one or more contexts, sometimes without realizing it.
 A [=person=] may not realise when they disclose personal data that
-they are vulnerable or could become vulnerable.
+they are vulnerable or could become vulnerable, and an [=actor=] may have
+no way of knowing that a person is vulnerable.
 
 Some individuals may be more vulnerable to privacy risks or harm as a result of
 collection, misuse, loss or theft of personal data because:
@@ -2114,10 +2116,11 @@
 easily than usual. Among other things, they should
 be treated with greater default privacy protections and may be considered unable to
 [=consent=] to various interactions with a system.
-People can be vulnerable for different reasons, for example because they are children,
-are employees with respect to their employers, are facing a steep asymmetry of power,
-are people in some situations of intellectual or psychological impairment, are
-refugees, etc. See [[[#vulnerability]]].
+People can be vulnerable for different reasons, and some people may
+be vulnerable in a specific [=context=]. For example, a child might
+be vulnerable in many contexts, but a person in a position of power imbalance
+with an employer or other [=actor=] might be vulnerable in the contexts
+where that actor is also present.  See [[[#vulnerability]]].
 
 ## Contexts {#context}
 
@@ -2267,7 +2270,7 @@
 Systems which [=recognize=] people across [=contexts=] need
 to be careful not to apply the principles of one [=context=] in ways that
 violate the principles around use of information acquired in a different
-[=context=]. This is particularly true for [=vulnerable=] people, as
+[=context=]. This is particularly true for [=vulnerable people=], as
 recognising them in different [=contexts=] may force traits into the open
 that reveal their vulnerability. For example, if you meet your therapist at a
 party, you expect them to have different discussion topics with you than they