For the record, we’re in 100% agreement that it would be terrible to allow screen reader detection API without restriction, but that’s not what IndieUI User Context proposes.

In a similar way, we allow location sharing with certain websites, but no browser gives out this private location information without a user prompt. The current editor’s draft of IndieUI User Context even increases that restriction by requiring authors provide a justification explaining the reasons why the site needs access to this information. If you don’t like the explanation, don’t share your information.