I just looked at PrincessShmoo's photos that she so kindly posted and the signs imply that walking through is ok, as long as you don't use the facilities in the area. Now, I didn't go to lawyering school, and my interpretation isn't a legal one, just a common sense one. However, I would still prefer children traversing the area not speak. I acknowledge it is not practical in all cases for an adult to carry them through the area, so I guess I'm ok with them being allowed to walk.