HooRU
Well, since I’ve been an adult since 18, I tend to support the idea that you’re an adult at 18. One noticeable point – at British universities, therefore, students are adults and treated as such.
I disagree with the idea of adults not being allowed to drink, etc. They’re adults. You don’t need a patchwork of regulations saying “you’re an adult for this, but a child for that”.
I think we’re all idiots, not until a particular age, but until we have to take responsibility for our own actions and choices. Delaying that date won’t help you be more responsible.
When it comes to 16-year-olds in the military, the appropriate phrase is “child soldiers”, and is not a good thing.
With respect to 16-year-olds voting, I’m inclined to view that negatively as a knee-jerk reaction; but I have not read any detailed arguments for either side.