Just about every article refers to a youth propaganda, errr, education program "highlighting the dangers of carrying knives". Nowhere could I find a list of these "dangers".
The closest I got was one (1) mention of the possibility of the knife being taken from you and used against you. This would solve that problem:
http://www.a-human-right.com/quacks_s.jpgAnyway, if it is that easy to take a knife from someone, you should be able just take it back again, right?
The only other danger which might qualify it for the plural "dangers" is that "knives can kill". On this side of the pond, knives can be used to kill, but they don't do so on their own volition very often. I think this is related to the media phenomenon that all vehicles involving in accidents have drivers except for SUVs. SUVs are evil and just act on thier own.
Perhaps some of our UK members can elaborate on what they're telling the kiddies?