Shawn Hornbeck was riding his bicycle on an out-of-the-way country road when he was taken at age 11. His abductor was a 6'5" male who weighed over 300 lbs. and brandished a gun. Personally, having grown up out in the sticks, I would never consider a country road anywhere as "safe territory", but I certainly would not compare it to a crowded theme park. The presence of thousands of witnesses is a relatively effective deterrent to crime-of-opportunty kidnappings.
FTR, there has never been a police-documented case of stranger abduction from inside any Disney theme park. Lots of urban legends, but not a single police report to back any of them up.