And no, it's not my petition, but it fucks me right off when people purposefully make life more difficult for others just because they are lazy knobs.
I saw a mother do that once (well I've seen it more than once) but on this occasion it was beyond the pale. The "culprit" was a very elderly man who parked in the last P&C space with his equally elderly, wheelchair bound wife. He was just getting her wheelchair out the boot when this nasty bitch pulled up and screamed and shouted at him about how he shouldn't be parked there, he wasn't entitled (yes, she did use that word) and almost reduced him to tears.
I told him to stay put, and told her he needed it more than her. All the disabled bays were full, but her gob was still going 90 to the dozen. He moved his car telling me he didn't need the hassle. She pulled in to the space and skipped in to shop leaving her child, who was about 11, sitting in the car. 
That poor man and woman would have spent ages getting ready to come out, getting the lady in the car etc and they didn't need or deserve that. It still pisses me off and it happened about 2 years ago.