I don't know if any users outside of Canada are able to do this yet but Twitter has given some, if not all, Canadian accounts a tool which allows them to select and hide replies to they don't like.
Other Twitter users can read these hidden replies but only if they know to look, and only if they know how; (Twitter has made little effort to publicise this info).
How to see replies hidden by Twitter users: See the dropdown menu of options by clicking the "v" shape symbol in top right corner of the original tweet. Under list including -Embed, Follow, Mute, Block etc select option to "View hidden replies".
Also, regarding the artwork used by Devon Rape Crisis- Am I the only one uncomfortable with the pic used by DRC? As a woman who's lived the fairly typical female experience of being sexually harassed, grabbed, groped, and worse, since childhood, I find those all those reaching, graspy hands quite unnerving. It's really not the graphic I would've chosen, if given that responsibility as worker or client of a rape crisis centre.