What do you do to prevent getting creep shot upskirt?

I read so many news about perverts shooting creep shots at girls on street or other places.

What's your prevention for not becoming one of the victims?

I had been taken up my skirt in a liquor store before and at subway. So terrifying.

Guys, how would you recommend your girls to prevent such things happening?
What do you do to prevent getting creep shot upskirt?
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