There's no damn good reason in changing the past girl. I've dreamt of it but the past defines who we are and the future is never set in stone. She has no right to go meddling in affairs and changing things that shouldn't be changed.
Think about what would happen if someone ended up in the 40s with the second World War raging around and someone having altered the past so that the Nazis win. The past needs to stay the past.
And her kidnapping innocent girls with psychotic men is never good.