Too often, bad parking goes unpunished by anybody, so it's gratifying to see that this person has been called out not just once, but three times. The story starts with a polite (ish) notice, under the right-hand wiper as we look at it, which is informing the driver that they're causing inconvenience to an office block by parking the way they are. There's obvious frustration in the tone, but the author has at least taken the time to explain why it's such a problem.
The person who wrote the message on cardboard under the other wiper didn't' have time for any of that. They've just gone straight in with 'You're a moron,' and allowed the facts to speak for themselves. To round things off, we can just about see an actual parking ticket away to the left-hand side. This person has been educated, insulted, and fined in one fell swoop. Good work, everyone.