I've been lurking for a while (this thread was 3 pages when I started following

) and I just had to comment after the last two entries. So glad J made it to her stroller on her own and had the good idea to stay still until she was found. That's the thing that my parents always taught us when we were little- If you realize you are lost, stay right where you are. Don't get MORE lost.
I lost my son four years ago at the museum. He was 3, and there were 3 adults watching him. We were in a multi-level play area and did pretty much the same thing. He went up the ladder, down the slide and up to do it again. This time, he didn't come down. We waited for a few minutes, then my boyfriend and I went into the play yard while my mom waited by the exit. Somehow, he came down somewhere else and slipped out the exit (there are two, but they are only 5 feet apart. We thought she could watch both...) and walked about 20 yards across the children's area before a staffer decided to find out why this toddler was sobbing by himself. We were all traumatized for life and he has never wandered off again. It's a good bet that J won't either!
And then on Saturday, we took him to the circus. I went to the restroom at intermission and on my way back, I noticed a little boy sobbing and turning in circles. I hung back and watched for a minute, making sure he was really on his own. He definately was. So I went and got him and took him to the nearest usher--WHO HAD BEEN STANDING FOUR FEET AWAY FROM HIM FOR AT LEAST TEN MINUTES and hadn't noticed him. At all. I had to explain to her TWICE that this was not my child, he was lost and needed help. Fortunately, there is a program (I think it was by the venue, not Barnum & Bailey) that gives kids free wristbands that they write the kids seat number on with a sharpie. That way, if they are lost, the show the band to someone and they will be taken back to their seat.
The museum people were soo much better than the circus people about the lost kids, and it's sad to hear that the Disney CM's are even worse!