Well, sometimes I have to say I have a little rant inside my head when I see the disabled toilet has a queue of prams outside and I know I need to go as quickly as possible. My experience was not that I got bumped to the front of the queue but that I got ignored and it took a very long time to get to the toilet. (I am working on my Hi I am disabled even though I may not look like it, can I take priority speech right now.)
Fortunately I was seated in my scooter at that particular time so no dire need, but I get a little annoyed sometimes that places choose to place changing facilities for non-disabled children because of course mums will all use it. The majority of the time it's not a problem, but the fact that it is even sometimes annoys me.
I have noticed lots of places now with a bigger cubicle in the normal ladies toilets, I assume for prams, or with specific baby change rooms and a couple of disabled toilets, which are locked and radar key accessible. I think they have got it right.
The disabled toilet really should be left for those that need it, and any venue I attend which doesn't differentiate between baby change and disabled does get an email or letter to explain, especially places where I go for leisure activities as they attract mums with babies and it's actually a consideration I have to make as to whether I can get to the toilet while there or not.
I really think this is something that the world is a bit behind with, ensuring accessible toilets stay that way but also providing for those with babies as that brings with it it's own set of difficulties when out. I think they need to be separated into different things.