I know enough about DEFCON to not use it as the backbone of my generalizing statements about the IT industry. It's the same as using some gangsta rapper to make generalizing statements about the Unites States: Most Americans are crazy about platinum-plated guns, hydraulic cars and coating your teeth with gold. Except they're not.And if you're not part of the industry, you're not really qualified to comment. (Even if your gender did not already disqualify you).
Women in IT are so brave. They're like male nurses, plus victimization - because men cannot be victims.
Just to address topic title, I seriously doubt women shun IT because of urban myths about widespread sexual harassment. Most women simply don't want to work in IT because it doesn't interest them at all. This lack of interest can be explained from the grooming of genders that takes place from an early age; females mostly being passively encouraged through media and immediate environment to pursue professions of caretaking.