Please.
It sure seems easy enough to us. However, there would have been no need to write notes such as this one if folks just parked properly. We do not know what you think, but it sounds perfectly fair to us.

Please
Quite Handy
If the message below is not clear enough for you, we do not think we can do anything about it. Maybe it is high time for you to take more driver’s ed and look for car insurance while you are at it. We do not think the driver should be allowed to park again before that.

Quite Handy