I guess I'm just assuming anyone would be smart enough to run, fight, or alert someone even if a weapon was shown. In this day and age, most women know the odds of surviving if they go somewhere with the perp.
I think a lot of people are too afraid/ shocked to do anything.
There have been plenty of cases on here where the victim goes with the perp and they don't return alive: Brooke Wilberger, Channon Christian, Eve Carson etc.
Best bet is to fight back etc.
Anne Sluti & Elizabeth Smart are some of the very few who do go with thier abductor and return alive.
In Anne's case, her kidnapper took her across state lines.
Her case is very interesting, I'd suggest checking it out.
Lifetime made a movie about her case too.