a lot get made up for Readers Digest because they pay 100$ for one good enough to go in. Not saying there arent idiots around, just read the Perth Boys thread!
I liked that one a while ago about the GSX-R rider who poured 2 bottles of NOS energy drink in half a bike tank and sugared up his whole fuel system, then noone believed he could be that stupid.

For me the prize idiot of 2009 is the politician, police minister i think who made a speech after the first "hoon" to get his car crushed got caught driving again had his 2nd car impounded then got caught riding a 25cc stand up scooter on the footpath for his 3rd big life endangering strike. The minister said "hes really stupid, i would even go so far as to say dumb", She wasthe stupid one since "dumb" means mute, unable to speak, nothing to do with intelligence.