To me, it is the parents without the situational awareness or the desire to care for their children that not only surprises me, but outright disgusts me. These are rules I have to reiterate to myself before I do anything:
One, if you must talk on a cellphone, do not drive and do not walk (even if using hands-free devices). Two, if you have children with you, keep a hold of them (direct physical contact preferred). Lastly, know where you are going, even if not on the cellphone.