Facebook should provide the platform and stop there. When they act as publishers and start editorialising or adding "platform opinions" to the user generated content, they can rightly be asked why they endorse everything else on their site that isn't "edited" or "added to".

We need to think real hard about what we want in 5 years and beyond from now... not just what we want now. Breaching the divide of platform and publisher for anything beyond light moderation to keep the platform usable, no matter how well intentioned, is bound to have a devastating result on future political expression.