I'm not sure if it's people not closing the bear boxes, of if it's just people that don't know HOW to close the bear boxes.

I've been at the Yosemite Trailhead parking lot and walked down the row of bear boxes. I've found up to 4 of them closed, but not fully latched! The bears there know full well how to open those!

Some people are just as stumped as the bears about how to open the bear boxes. I'm not surprised they're stumped also on how to CLOSE them.