Apply suggestions from code review

Co-authored-by: Jan-Erik Rediger <badboy@archlinux.us>

docs/user/reference/general/index.md

@@ -40,10 +40,11 @@ The following steps are required for applications using the Glean SDK, but not l
 
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-##### Do not initialize with a fake value for `uploadEnabled`!
+##### Initialize clean with the correct value for `uploadEnabled`!
 
-> `Glean.initialize` **must** always be called with real values.
-> For example, never call `Glean.initialize(upload=true)` if `true` is a placeholder value that later gets reset by `Glean.setUploadEnabled(false)`.
+> `Glean.initialize` must **always** be called with real values.
+> Always pass the user preferencen, e.g. `Glean.initialize(upload=userSettings.telemetry_enabled)` or the equivalent for your application.
+> Never call `Glean.initialize(upload=true)` if `true` is a placeholder value that later gets reset by `Glean.setUploadEnabled(false)`.
 > Depending on the provided placeholder value, this might trigger the generation of new client ids or the submission of bogus [`deletion-request` pings](../user/pings/deletion_request.md).
 
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