Caroline Criado-Perez, a 29-year-old student, was told to "die you worthless piece of c**p" and "go kill yourself" and "rape is the last of your worries" by 23-year-old Isabella Sorley in a series of tweets, Westminster Magistrates' Court in was told.
She also sent the message to Ms Criado-Perez: "I've only just got out of prison and would happily do more time to see you berried!!(sic)"
Separately John Nimmo, 25, told Ms Criado-Perez: "Ya not that gd looking to rape u be fine, followed by another reference to rape in another message the court was told.
Nimmo also targeted Stella Creasy, the Labour MP for Walthamstow.
The pair pled guilty to sending "menacing" tweets.