From what I gathered with that droid, it also popped up at the Launch Bay in Disneyland.
This one didn't seem to have problems with people crowding around it and wanting pictures. Though I guess that might be due to the fact that the one out in the park is more or less getting the reactions of 'Oh cool what is this?! Must take pictures of it!'. In fact, I believe the testing in the park is more due to see how good the droid works in a more open, crowded environment, where such things like grabby children are there to stop the droid. Basically, things that a moving thing on its own would have to deal with, especially if they want the immersion factor to be there without someone escorting the little guy.
However, if they did have to get someone to escort the droids, they can easily set it up as that person being the droid's handler or so. Since usually droids are owned by someone.