It is very silly to be bothered, wound up or 'bugged' by a situation you perceive in a moment in time, involving highly moveable objects.. ie cars.
To get wound up because when YOU arrive, you see a blue badged car in a P&C space and no further free P&C spaces, but a couple of free blue badge spaces...
1/ You have no idea if the car displaying the badge arrived with a parent with a disability
2/ You have no idea if the car displaying the badge arrived with a child with a disability
3/ You have no idea if there were plenty of P&C spaces but no blue badge spaces when the 'offending' car arrived.
You have insufficient information to form any judgement - so since it isn't your place to judge, leave it the fuck alone.
Last week we parked in a P&C space at my local supermarket.
You would have seen us get out, without a child and go into the store.
Unless you sat there for an hour, you would NOT have seen us meet with another car, transfer a child seat and a child over to my car after I had done my shopping.
Without talking to me, you would not know that I have checked with the store that I may use this particular row of spaces, because they permit me to have my vehicle reversed in, and use the walkway to unload my rear-unload chair.
You would also not know that the blue badge spaces in this store all require the car to nose in and unload into the road or at the side because they either have anti-ram-raid bollards slap bang in the centre of each one, less than a cars width apart, or they back onto a steep kerb and bank.
So even if I had not been collecting a small child for the afternoon, I still had valid reason to be parked there that was none of your business.
The week before we parked sideways across three spaces at the farthest end of the carpark as there were no spaces suitable anywhere else - I hate doing that as it means my rather distinctive brightly coloured van tends to feature on the 'parked like a knob' local pages (the contributors to which are incapable of deducing why I've parked there of course!).