I often give people a break in my mind. If someone's driving crazy, I think "well, maybe they have a toddler who needs a potty" or "maybe they are on their way to the hospital!". You really never know a person's situation until you ask and if you can't or don't want to ask, then you just have to give them the benefit of the doubt.
It's strange now when I take the kids out to the park or Target, I can feel the eyes staring at me. I know they all wonder "why is that baby's head so flat??" and "why is that big girl in diapers?" I can overhear moms of well behaved children comment on my 3 year old girl who runs screaming into the wading pool after I've just gotten her dressed for the ride home. The GLARES burn when I jump in to drag her out, talk with her about it and then when my back is turned, she runs back into that pool.
I want to yell back "You don't know their story! You have no idea where they've come from and what they've been through!". But I do. I know why they look and act the way they do. I also know how sweet they are, how eager they are to be touched, held and loved.