Share a file.... Can Everyone mean 'Everyone'? :-)

When using the awesome EasySocial activity stream as a logged in user, I have the option to 'Share File'.

I want to share a PDF with everyone. I can upload it ok with 'Share File' and have 'Everyone' set in the privacy when I do so... but then it seems only logged in users can access it? How do I set things so they 'Everyone' means 'Everyone' and there's no annoying barrier to access for my community forcing them to login if they don't want to / don't have time?

Thanks.