The On the Road actress argued that social networking sites have made it easier for people with a grudge to track her down.
In an excerpt from new ebook Robert Pattinson, Kristen Stewart, Taylor Lautner - In Their Own Words, Stewart is quoted as saying: "Nowadays it's harder because everyone is on Facebook and everyone knows where you are all the time, and everyone's Twittering.
"I'm going to die because somebody is going to say where I am and somebody is going to kill me. Someone's going to Twitter my location and it's going to be, like, boom."
Stewart is rumoured to have reconciled with Twilight co-star Robert Pattinson after cheating on him with her married Snow White and the Huntsman director Rupert Sanders.
The 22-year-old admitted in a recent interview that she can be "a miserable c**t".
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