Yep this abuse of the accessible parking bays is more and more common and increasingly annoying. I over heard an irate Blue badge owner in discussion with a young bimbo who left her grandmother in the car whilst she went shopping for 3o mins. The guy had been parked waiting to get his wife out of the WAV but had no where safe to do so.
I may have mentioned it on another thread that my brother used to be a parking supervisors at a local hospital. One day he had an irate blue badge owner berate him because there were no accessible parking spaces available and he had to walk around the hospital perimeter twice to find someone to complain. My brother dually filled in a complaint form recording the details and the persons address and got him to sign. Then pointed out that the perimeter of the hospital is several miles long and even a fraction of this would make him in eligible for a parking entitlement and that misuse would be considered fraudulent – for someone with an alleged disability he sure disappeared quickly!