When my niece was in college she and her bestie shared a ground floor apartment with a slider that led to the patio, all ground level/parking lot level. Scared the daylights out of me and I was constantly worried about them. I told them they needed to put a pole in the bottom of the door to make sure someone couldn't just open it up. Luckily nothing ever happened, but that could have made a big difference.On the discussion about forced entry, IMO:
Most locked sliding glass doors are easy to defeat.
Put on rubber gloves to get a better grip.
Place the palms of your hands on the glass and push upwards on the side by the latch.
The door will lift up about an inch … off of the latch.