I don't see any reason why these things should all happen at the same age, or indeed at the same age for everybody.
Why not have every youngster take the
British Citizenship Test and let them vote if they pass it? At whatever age.
Well, because knowing the meaning of Magna Carta, or when female enfranchisement occured has little to do with smoking. I think the reason it should be normalised is that the whole point of banning things by age is that people's faculties of rationality have not developed to a point where they can be trusted to make the right decision. Now, like you say, this certainly doesn't happen to everyone at the same time, and to some people never does. But... well, we need to draw a line somewhere. It doesn't, to my mind, make any sense to say that any given person's mind
is developed enough to have sex but not gamble, for example. Why the difference? If you think sex is potentially damaging (and the fact we don't have a staggered age of consent for sex like much of Europe suggests that this is the case) then why do we assume that a 16 year old can rationalise their decision making about that, but not smoking? This is the case whatever the specific ages are.
I'd question the ability of a test to accurately test one's maturity. Knowing 'the government' it would become, in not so short a time, a smorgasbord of propaganda about those items that it 'unlocks', like an angry mother begrudgingly allowing her son to go on a hunting trip with dad - ie
"Which of the following is true? Circle all that apply.
Smoking gives you:
- Loads of Cancer
- Loads of respiratory Disease
- Poverty
- No Friends"
In addition to that, I don't doubt it'd become, very quickly, like the driving theory test, where you buy the training DVD, hammer it, pass without thinking and find yourself unable to recall anything within 10 minutes of leaving the exam hall. If a test that accurately measured it could be made, I'd buy into the idea, I'm just very sceptical.
At the end of the day (in the words of John Terry), whatever age you choose there will be a ton of people that don't know what the fuck they're talking about. The longer you leave it, the slightly fewer of these people there'll be, but the more people you disenfranchise. I struggle to care much about the whole debate because most 16 and 17 year olds think they know everything, and the national debate is not, I think, missing their voice. That said, I think that the lower the age of consent, the less bang-whizz it becomes when one can finally do it (see: alcohol) so I'd have no real objections to lowering it.
In other words, I've just wasted your time reading all this, because my conclusion is "I don't care."