I have personal experience of the sort of negative reactions people who don't have an "obvious" disability.
My late mum suffered from severe Crohns disease, so to the outside world, she looked "normal", but qualified for a blue badge, which she had, but very often would ask me to park in a normal space, so (in her opinion) people with more severe disablilites could use the disabled spaces.
Imagine how infuriating it was when we walked past the disabled spaces occupied by non badge holders!  Got - 2017 SDV8 Autobiography in Loire Blue
Had- 2008 TDV8 Vogue SE in Java black
Had - 2007 S/C in Stornoway Grey

Hey I love my blue badge .... means i get free parking and nice big bays to park Rodney in which is a bonus as less chance of inconsiderate door bangers and I am genuinely disabled but to look at me you would think there was nothing wrong with me but hey the stigma that goes with being disabled is just something you have to deal with.

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And this is what greeted me after having a coffee at my favourite place , in my opinion totally uncalled for but I have taken note of the nob's registration and will be keeping an eye out for it in the future.
Oh I did leave a note with a few choice words on his windscreen, makes my think I should print some posters up for future incidents and will be using brown packing tape to put them on as the leave a nasty mess on someones windscreen.

I am sure I will get different opinions on this post

What makes it worse is the fact that this was a disabled badge holder to

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Don't have to do anything, they are driving a bloody Picasso. That is enough punishment I'd say  MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!

Tow bar is a good solution to that kind of parking  56 TDV8 Vogue SE
9 Freelanders, 2x 2002 TD4ES, 2001 TD4, 2002 1.8GS, 2000 XEDI, 2x 2000 1.8ES, 2004 1.8 & 2000 1.8 GS (rolled)
91 Lotus Carlton (sold)
90 Lotus Elan (BRG)

Funny , was just discussing that option with a friend
Not that I have any need for a tow bar but would be a preventative to inconsiderate parking like this

That's the reason I now leave the towbar on the car stops knob ends like that parking up your arse or they end up with a nice f*cked bumper. Gone
67 Nissan navara
67 C220 AMG
12 Tdv6 Discovery 4 HSE
09 TDV8 Westminster
59 BMW 520d touring
56 RRS tdv6 hse
02 td 6 hse

I was about to give out to a guy in a new Porsche 997 who parked in a disabled bay tonight, luckily I didn't say anything as he assembled his wheelchair & slid out into it!