How platforms alter history
"What’s behind that impulse to delete? When it comes to acts of violence, taking down profiles may help stem the impulse to try and build a logical case for an act where logic played no role. Distancing a platform from a senseless act of violence may be a public relations move, or a matter of taste, or maybe meant to discourage a profile from becoming a shrine for copycats. But the act has rare precedence in less recent history, and even carries negative connotations with non-online examples — say, if no one were allowed to read the Unabomber’s letters."
"Norms around social media are still evolving, and the urge to delete the profiles of wrongdoers has evolved over time. Surprisingly, the Twitter account of Dzhokhar Tsarnaev, one of the two brothers who bombed the Boston Marathon in 2013, was never taken down, even after he received the death penalty in 2015."