I remember that I once came up with a fun way to estimate another person's IQ based on observations. I'd give them the benefit of the doubt with a decent starting point and then apply my list of subtractions such as gum chewing, -5 pts; backwards baseball cap, -10; piercings other than one in each ear, -2 each, etc. I can't remember them all now -- any ideas?

Maybe we could apply this to cyclists, such as a -15 for having drop bars mounted upside down. Another that comes in mind are recumbent riders, who get a +10, but only in their own opinions. Sorta like Prius owners.