Stealing a parking space which is intended for the use of a disabled person isn't just inconsiderate, it's offensive. The spaces are logistically positioned to make it easier for people with mobility issues to get around. If you steal a disabled parking bay, you're choosing to make life harder for someone with a disability. That doesn't just make you a bad driver; it makes you a bad person.
Whoever parked in this spot reckoned without the resourcefulness of the people around them. As they'd clearly missed the signage which indicated that they were in a disabled bay, the local citizens decided to spell it out for them by completely covering their car in thousands of post-it notes, with the universal symbol for disability on the side. It then turned into something of an attraction, with people queuing up to take pictures. That would have been awkward when the driver came back to claim their car.