Mind your own damn business!
No, I'm not a helicopter parent. I'm not the clingy, over-protective mother who needs to take their 3 other children, the dog, the cat, and the goldfish to the bus stop twice a day because heaven forbid their child learns to be comfortable on their own and develop an independence.
Whether or not the gaggle of other mothers and their mob of children and pets can see us is irrelevant, and frankly, it's none of their damn business. We can see P. And guess what? We can see and hear the other mothers as well.
Do not stop my child and ask him whether he can see us, and 'look out' for his safety. What exactly is your plan if he can't see us, though he knows we're there? Hover over him until he walks the half a block home? Take him home with you until my husband or I can be 'located'? We're honest and open with P about the world. He knows not to go anywhere with anyone for ANY reason, and more importantly, he knows why.
Now, this isn't to say shit can't happen. It can. It does. That's why we wait on the porch and watch. We're giving P the freedom and independence he needs to grow and step out into this world as an adult, while at the same time ensuring he remains safe.
Don't stick your nose in and parent my child the way you parent yours. Because frankly, I think your method is as much a load of shit as you think mine is.