We went in October with some friends and they had their stroller "taken". I really don't think it was so much stolen as it was a case of mistaken identity. LOL! They had their backpack in the stroller.. there were no valuables in it, just the autograph book and a change of clothes for the girls. They finally found the backpack at Lost and Found at AK but never got the stroller back. We assume whoever took it must have thought that since they left their stroller back at the attraction, they would just keep the one they had. (our friends') and turn in the backpack.
I have to tell ya, it ruined everybody's day because our friend was just beside herself about that backpack. She didn't care about the stroller, since it wasn't very expensive, but that autograph book...OY!
Thankfully everything turned out okay in the end. But it can happen.