Stupid will go full steam ahead toward that ten mile high brick wall of reality. The hit will be catastrophically heard and seen. 'Well, who put that there?' :)
'The Dunning-Kruger Effect: Why The Incompetent Don’t Know They’re Incompetent'
The Dunning-Kruger Effect: Are the Stupid Too Stupid to Realize They’re Stupid?
Graphic version of the Dunning-Kruger Effect?
The Dunning-Kruger Effect: Why The Incompetent Don’t Know They’re Incompetent
The incompetent are often blessed with an inappropriate confidence, buoyed by something that feels to them like knowledge: the Dunning-Kruger effect.
The Dunning/Kruger Effect: You're probably not as good as you think you are... unless you really are good.
Donald Prothero's blog post on the Dunning Kruger Effect: Stupid are cocksure, intelligent not so.
The Dunning-Kruger effect is a... case of the bias known as illusory superiority... (Wikipedia has a better entry, but has no image: http://en.wikipedia.org/wiki/Dunning–Kruger_effect)