Such sites need think real hard about whether they want to be a moderated community or a common carrier. Moderated community? have to hire a lot of people to mo

Such sites need think real hard about whether they want to be a moderated community or a common carrier. Moderated community? have to hire a lot of people to monitor & cull content, publish clear rules about what's acceptable and what's not, and take their lumps when action/inaction has problematic consequences. Common carrier? then make clear nothing is moderated save for blatant criminal violations (at which point police are informed), and legal (if objectionable) content is simply published/transferred without hinderance. Tough call. Twitter et al are trying to be both; this will backfire bad at some point.