` ` People deserve to feel safe on site , '' it says . Site is adding staff to investigate complaints of abuse . A ` ` report abuse '' button also is being rolled out . Moves in after reports of rape , other violence in the UK .
`` People deserve to feel safe on Twitter , '' official says . Site is adding staff to handle complaints of abuse . A `` report abuse '' button also is being rolled out . Moves come after threats of rape , other violence in the UK .