Following the online abuse suffered by Caroline Criado-Perez, does Twitter need a "report abuse" button? After it was announced that Jane Austen would appear on the new £10 notes, Criado-Perez says she bagan receiving "about 50 abusive tweets an hour for 12 hours." In a piece for Independent Voices, Criado-Perez says she was told by numerous people just to ignore them "After all, we don't feed the trolls do we?" Criado-Perez ignored this advice and instead began to fight back. A petition has now been set up asking Twitter to put a "report abuse" button on tweet. Do you think this will work? Is ignoring such tweets, or leaving Twitter still the most effective response? Or is there something else that can be done?