Audrey Watters blocked Genius and Hypothesis from her blog on Apr 2017: http://hackeducation.com/2017/04/26/no-annotations-thanks-bye

There were discussions about opt-out mechanisms in the Web Annotation Working group (see here), but in the end it was decided that further work would be deferred to to a future version of the specifications.

It's fun (?) that a few months before Nate Angell published in the Hypothesis' blog that Hypothesis was doing pretty well with the Audrey Watters' Test for Educational Technology.