As i said upthread, if you think there is a need for a short term 'pink' badge (it was someone else who suggested pink), then campaign for it and sort it, don't steal my fought for rights.
I will not agree that 'sometimes' it is okay to use a bb space without a bb. As i said, park across two bays, you arent breaking any more rules than by using a space that is designated for people with permanent disability.
I am shocked that someone who has experience of the actual everyday life of disabled people would argue about this. No, scratch that, I'm not surprised.
You seem to think it is rare for someone to have a 'real reason' why they should have that space? People get hurt. Often. Most people will be on crutches at some point in their life, and some in wheelchairs. It might last a long time, but it is not permanent. That is the big difference here, you only have to worry about it for a short time, this time next year you might not even have to think about it.
Anyway, when it is hard enough to get a space now, people with other injuries would then start taking the spaces too. And you can build all the wide spaces you want not that they would, but only some people will be able to be close to whatever it is. And the policing of actual bbs now is shite, i can only imagine how bad it would be if anyone could get a temporary one from their gp.
Fuck it, do you know what? Its a hell of a lot easier for me to just not leave the house, why am i fighting this? Don't be inconvenient beyond, theres a nice wheelchair person. Just let the regular people go about their lives, and god forbid you upset one of those 'regular people' who happens to be temporarily incapacitated. How dare you, you have no idea how hard their life is 
Oh and by the way, i couldnt park at the gym earlier. Seems there was a birthday party and they needed to park close so they didnt get the cakes wet. Five spaces, not one badge. But thats rare in mnland, isnt it.