WHAT IS A DUMBASS?

For years I've wondered what it is exactly that make a person a dumbass. I admit that I don't know what small bit of DNA contributes to it. I don't even need to know. But I know one when I see one. To wit:

A. The woman who used to be my demonic neighbor

B. The kid who drives slowly waiting for me to pass, then does anything to prevent my passing, or even getting back into the right lane (two times, weeks apart)

C. The stopped driver who waits and waits for me so he can pull out, then pulls out in front of me just before I get to him

D. The high-school teenager who does what driver C. does as she coaxes her little 4-cylinder up the hill that I'd already sped up for, then flips me off because I only had choices to pass her or take the ditch

E. Drivers who roll through a 4-way stop....because I'm already stopped

F. Slow, inattentive drivers who wake up when I pass, then are hell bent to stay on my back bumper

G. The driver who's in such a hurry to pull out in front of me to do 35 in a 55

H. The ignorant driver suicidally pulling into 60 mph traffic and thinking they can get to 60 in 2 seconds, but it takes them a minute and a half

I. The cell phoner who knows they have to stop at the light - but it's green

J. The so very cautious driver who waits and waits and waits for the oncoming car to pass by, the oncoming car that is 3/4 of a mile away and obviously doing 30

K. The "look at me" driver who just installed illegal bright-as-the-sun, purple HD headlights......aimmed higher than everyone else's, then gets road raged because you flashed him

L. The "pet lover" who lets her cute Fifi drive while she's on her cell phone

M. The "empathetic" driver who wants to let someone out of the parking lot, but it's just us two in line

N. The person who puts out garbage on Monday for it to blow into my yard before Friday pickup

O. The rocker down the street who wants to entertain the entire neighborhood with his new stereo

P. The payables clerk who relies too much on her out of date 'database' that didn't post my payment

Q. The banker who want ME to pay for doing my banking with him

R. The grocery sacker who put my chips in the bottom of the bag, under the gallon of milk

S. The chump who panhandles for chump change, then drives home in his new Caddie (maybe this one's not a dumbass)

T. The cop who assumes everyone's got a bale of cannabis in their trunk

U. The Democratic Party

V. The Nobel prize panel that chose the Democrat's 'change' president

W. The University of Colorado's Ward Churchill

X. The "global warming" chickens

Y. Anyone who characterizes a person attending a "tea party" as a communist

Z. Anyone who voted for 'change'

I'm out of letters, but I'm not out of dumbasses. Please Comment with your own list.