Just to set the scene a bit, my town is fairly small and has 3 loos with baby changes that are for general public use (ie not in a coffee shop where you have to buy something, even some of these have radar keys too). All of these are accessible toilets with radar keys. Usually it's a bit of a pain in the arse to hunt down a member of staff/ visit the shop mobility to get a key but really just a minor inconvenience and not great when ds has done a poo.
Today though I had to visit shop mobility to get the key, the key was not in the usual place so it had to be hunted down. As I was changing ds someone knocked on the door so I finished up as quickly as I could. When I came out a woman in a wheelchair was waiting and although I apologised she really did not look happy, I felt awful but ds needed a change. If I didn't have to track down the key I wouldn't have been long gone before she knocked on the door. Would I be unreasonable to buy a radar key online just for the use of these toilets?