This is my favorite post about this issue from Spyderco forum.
ed shemmpp said:
Many here have been handling and carrying a knife most of their lives, many at a much younger age than the young gentleman doing the video. I've carried sense I was 5, and was free to hunt with a firearm at age 10. I did take a hunter safety course. I confront many hunters every year
that don't have the training or the education to hunt safely. It is not so much a matter of age as it is education and experience. I have great faith in the youth that when handed a responsibility often handle that responsibility better than adult particularly those that need a two ton cooler carrier.
Urban pressures are another matter, as are urban laws designed to handle the lowest common denominator. In the urban environment the laws carry more weight than the need. Parental supervision and interaction are paramount to youth with knives.
My country has two laws about it, knife law and light crime law.
Former prohibits to carry fixed/folder that have over 6cm total blade length,
and in details bans include carrying folders with every locking mechanisms.
Latter is very fuzzy and useful for police to arrest who have SAKs and stationery cutters,
and many policemen target weak people for their business performance.
This is very inconvenient for me even in urban environment.
I'm sad I cannot buy fruits to eat at any parks, to be forced to use dull tools,
and people have been forgetting to solve their problem with their personal skills and equipments.
Politicians scream their regional identity but ignore practical roots of hand-working trad,
and agitated people say everything comes to be from "their" social justice.
We are about losing cultural base of EDC,
and most knives shop is getting main sales from "fighting/tactical knives".
But most customers cannot handle them and take them outside,
and only can consider knives as a selfish fantasy gadgets.
Technical discussion is not growing because of public monitoring,
and tactical dreamers are talking virtual issues continuously in BBSs.
I am not so nervous about SD but feel very difficult to walk with others.
Once I was closed to
Akihabara massacre with my family,
then I accompanied her martial-arts lesson because I felt something at that time.
She has rheumatoid arthritis and is impossible to run away,
and lots of her partners didn't have mindsets against criminals.
Accident happened other side of the station fortunately,
but I was very afraid after hearing loudly broadcasts that
I didn't have any arms, even short stick to protect them.
Totally it looks like a symbol of kindergarten and gerontic society I feel.
They are prohibited to take their responsibility to their behaviors,
and seems to think every ridiculous thing without law limitation is permitted to be done.
Almost like a child they can test other's patience because nobody have their own arms,
and their frustration synergy will result to more nonsense and constrained regulations.
They can find multiple improvised weapons to fill their desires without any knives,
so that can they swing umbrellas like SAMURAI to injure others, it pisses me off every rainy day.
Bicycles pass too closely like robbers and women likes to carry heavy attacking bag,
that makes me think whether knife laws are strict or not they cannot change such behavior.
I sometimes hope I can EDC my SAKs, Opinel, Svords for utility in urbans.
Of course these are only IMO in my country.