My own experence at airports and various other places with tight security has been interesting. Security staff simply don’t know what to do if you are disabled and as a result don’t know how to help.
At Berlin airport I was asked to remove my supportive boots compleate with orthosoles, stood on one leg. I explained that I could not stand on one leg let alone stand on one leg and remove my boot at the same time. I asked if I could get someone to take my boot off for me, this was not allowed, I asked if they minded me sitting on the floor this was not allowed. In the end the person I was travelling with had to physically hold me up whilst I removed my boots and orthosoles, A very humiliating experence, when the time came to put my boots and orthosoles back on, I was given a chair!
That’s the only really negative experience I have had other than being accused of being drunk and the walking through the gates with no cane or guide dog taking a leap of faith.
Interestingly Gus has never been security searched however my long cane has been, I was asked to fold it down so a security guard on the London Eye could check there was nothing illegal inside!