what a load of shite you talk.
I have 2yr old twins and I regularly let them chomp on stuff before getting to the checkout. When I get to the checkout I let the checkoout person know and they just scan the already opened food in first. So if the supermarket are OK with it, why arent you...
Safety reasons. Kids can run off into where the cars drive around. Also, toddlers struggle to put umbrellas over themselves if its raining.
But what I REALLY hate is people who park in the parent and child spaces who don't have children. The births are wider so you can put the trolley along...