How "smart" do you have to be?

[Bushbasher]

I was just reading the thread about Ignoring the obvious, in the Pub, and it got me thinking about common sense and logic. Now, I test in various IQ tests at around the 125 mark but I don't consider myself particularly smart although I do like to think I have a bit of common sense and logical thinking on my side. So I have to wonder what is it that can make what is considered reasonably intelligent people, mostly the younger age demographic but older ones too, completely devoid of common sense or a level of logic that will allow them to think before they act.
Even in the middle of hormone fuelled puberty when we all make some stupid and ill considered decisions I was still able to know where and when to draw the line and say, 'yup, this is risky but the next step is just downright stupid and dangerous'. I came close to the edge a few times but when I did I recognised that the edge was there and knew not to go near that edge again, yet there is so many young and old that are oblivious to the dangerous situations and circumstances that they put themselves in so blithely bumble along at the edge of disaster till they either cause themselves and/or others grief or someone WITH common sense and judgement pulls them away from the edge and points out their predicament for them.
I find the older I get the less tolerant of stupidity I have become, yet at the same time the more stupid people there seems to be with no common sense, judgement or logic let alone courtesy and consideration, but that's a whole different issue.
Is it me or is the world breeding more stupid people now than it used to, or is it just that there are now more people to start with so the percentage of stupid people is unchanged and there's just proportionally more of them?.....or am I just a cynical old bastid becoming more anti social as I get older?

That's enough of my idle musing.....