What about death threats? What about organizing a lynch mob? What about someone else posting your personal info and browser history? What about extortion attempts? What about copies of anything you've ever written?
And we can't just draw the line here when considering the ramifications of absolute free speech. Basically everything that involves human art of creativity is free speech. If that's absolute then any depths of depravity is free. One could fake horrible, violent, traumatizing acts being performed by people on other people and then claim it is in fact those people, spread it on billboards and across from schools, and that's all under the purview of free speech.