The whole "Are you going to pay his legal bill?" question is just stupid.
If you advise a student of yours to practice the sai the same way your instructor taught you (to run with them them) will you pay their medical bill if they trip and stab themselves? If you recommend a restaurant saying they have great food and service based on your experience and the people you recommend it to go there and get horrible food, crappy service you will pay their food bill right?
Come on...according to that line of logic, you should not give opinions based on experience to anyone unless you are certified on that subject to do so. The bottom line is the opinion that was gave was based on experience. The words that were used was 'SHOULD be'...not 'definitely will be', not 'no problems at all', no 'get out of jail free card'.
Allow me to add this to the I told you so section. Golden Gate Nationals was just held in Santa Clara, California. It was an open martial arts tournament where people with nunchaku attended to perform in weapons division. Not one person was arrested on their way to the tournament, at the tournament, or coming back from the tournament for illegal weapons.
Hmmmm...
Poor logic. The fact that people don't often get pulled over for speeding does not make speeding legal, nor does it stop the police from writing tickets for speeding.
And giving advice on using a sai is not the same as advising someone to break the law just because one has noticed that people break that law all the time and don't often get caught.
The fact is, such weapons are against the law in California, and there is no exception to it for taking the weapons to a tournament. The people you mentioned all broke the law, apparently. They did not get caught - good for them. But if they had been caught, they'd have been arrested - I think we can see that pretty clearly as the new story shows just happened at the airport in Ontario, CA.
So giving someone advice to break the law remains a bad idea. And my suggestion is that if you are not planning to pay for their legal defense, advising them to break the law is a poor idea.
Imagine if the O/P had done as several had advised, and it was HIS name in the news for carrying nunchaku and getting arrested. Which of those who advised him to do so would speak up and say
"Whoops, my bad, let me get out my checkbook?" More like refuse to address the subject and tiptoe quietly away is more like it.
We all get that the law is seldom enforced. It's still the law, and as we see, when it does get enforced, people get arrested. That tends to ruin one's weekend, eh?