I watched this too, although I do think the program was scraping the barrel slightly. I wasn't massively shocked by any of the scams, especially this one.
I honestly believe that the man paying his mothers bills, didn't think he was doing anything wrong. They took the badge from him, which is fair enough, but to then give him a ticket as well, I think was a bit over the top and uncalled for.
The only one that did make me really angry, was the chav woman in the black car, who having been caught using a disabled badge, sped off up the road and dragged a poor old woman out of a nursing home, just to save her own skin. I was absolutely gobsmacked at that, and thought it was disgraceful!
I have to admit, I've parked in a disabled bay before as it genuinely was the only space left and I needed it very very briefly. I came back to find a note on my windscreen, saying "Fraud. I hope one day you ARE disabled".