@audreywatters @mtechman @hypervisible @onewheeljoe Even with the script blocking @hypothes_is it is still possible to annotate hackeducation.com. Fortunately, though public annotations appear in the Chrome extension as existing, they don't physically appear on the site itself and need to be searched for manually to be found. I was able to do this with only just a few minutes of work, and could probably hack something more significant with some time/effort.
Hypothes.is should really try to do a better job of preventing abuse in these types of situations so writers needn't worry about providing abusers the ability to use a writer's own platform to harass them. Perhaps borrowing the NIPSA concept from Flickr for flagged annotations and/or accounts? (NIPSA is an acronym for "Not In Public Site Areas", and an admin feature of Flickr that allows their support staff to mark an account such that posts from it will not be shown in search results and other similar public views of posts.)