[nradov]

Twitter already does take down legitimate free speech content. Their terms of service are far more restrictive than the US Constitution. And sometimes Twitter management takes down content or bans users on a purely arbitrary basis just because they don't like it (or they think their major advertising customers won't like it).

There's nothing special about Twitter or any other Internet site. If someone libels you then you have recourse through the civil courts. And if you file pro se then it's very cheap.