It's impossible to get any piece of content on twitter or youtube to you against your will - you have to go to that site and look at that content. Facebook is a

It's impossible to get any piece of content on twitter or youtube to you against your will - you have to go to that site and look at that content. Facebook is a bit trickier since your default view is formed by "friends" actions and "suggestions", but it's pretty east to make it so no undesirable content gets through. Most complaints are not about somebody inadvertently seeing undesirable content, but from somebody who went looking for it, found it and then demanded to remove that content from the platform - despite many willing consumers of the content. So don't bring the shade of John Stuart Mill in here - the "harm" to others is only the feeling these "others" feel when they see somebody thinks differently from what they want them to think, and they are not willing to tolerate it, not on their platform.