Ms Sinéad McSweeney:

I will start with the initial question about blocking. If a user blocks another user, the person who has been blocked will not be able to add that user's account to any lists they might have, will not be able to follow the user, will not see the user's profile in their timeline and the user will not see the blocked user's tweets or material. That is blocking. With regard to statistics, I do not have a statistical breakdown on blocking.