Siphoning?

I was wondering if any of the blog readers have encountered siphoning from their gas tanks? With gas prices rising, a helpless scooter parked on the side of the road may not have a change. It happened a few years ago t my boyfriend and I. Someone siphoned gas from our P200s. I'm guessing with today's scooters this won't be a problem, but let me know if it has happened to you...