I was employed for a number of years by an elevator company.
One job we had was installing an escalator in a shopping centre.
The shopping centre was open and trading(at the bottom of the escalator was a bakery--all day long the smell of baking goodies wafted over me and my electrician offsider

).
We had the area around the escalator closed off and bunting up with access warning signs all over. We complied with all health and safety regulations--we HAD to!!
In the process of installation we had to remove the steps and covers to install upgrades(yes even mundane things like escalators have upgrades). Those alloy covers you step on to get to the steps cover the 'control room' about 3' deep. So when you are squatting in the 'control room' and bob up you really are looking at floor level.
So. We are working in the 'control room' when I hear,
"Excuse me. Can I go down the escalator?"
I look up and there is a pair of dainty red shoes and dainty ankles to go with the dainty female voice asking the question. I looked no higher. I looked down the escalator with NO F@@@ING STEPS and no way to get to them if it did have and said "NO".
I didn't look to see if she was blonde after I said "NO" and she'd walked away----------OUT THROUGH THE SECURITY BARRIER AND PAST ALL THE DANGER AND NO ENTRY SIGNS!! We could not work out how she could have been so blind to everything arrayed against her access.
Dumbfound to say the least.
Col.
White on White fly all night.
Red on White you're alright.
Red on Red you'll soon be dead.