[MichaelZuo]

The vast majority of social media 'libel, fraud, threats, and other illegal acts' involves an unverified identity as either the sender and/or receiver. It can all be ignored with a click of the button, or often even easier because one never sees it in the first place.

And why does it matter if the total number of messages exceeds our ability to read them? People don't sue over an aggregate of messages but for individual messages. If there are too many people suing then the courts will simply take longer and longer until an equilibrium point is reached.