Pretty funny, but very dangerous. Those signs are there for a reason and I think the fines should be heavier than reported in the article.
Some Web sites, such as Jalopnik.com, have published tutorials titled "How to Hack an Electronic Road Sign" as a way to alert security holes to traffic-safety officials. Jalopnik urges its readership of 2.6 million a month not to put its lesson to practice.
Yeah? Then why post the how-to? It's not enough to know how to do it and report as such to the authorities; they've got to lay all the step-by-step out for John Q. Teenager with a point to prove. Sounds like culpability to me.