Question for all idiot car drivers out there...?

OK, let me get to some details first. Answer this question if you fit into any of the following:

1) You drive way above the speed limit like a bat out of hell, as if you own the road

2) You park where there is clearly no parking space and in a way that obstructs traffic

3) You don't turn on your car lights in a tunnel

4) You aren't old and yet you still drive too slow

5) You stop at an intersection when there is clearly no sign or marking indicating for you to stop

6) You don't use your turn signal for turning or changing lanes, not as a fluke but all the time

7) You see a car coming onto a freeway from an onramp with its signal on and not much space ahead to change its lane but you barrel on anyway, neither slowing down nor changing lanes

8) You make a left turn through heavy two way traffic even as the guy in front of you tried it and got into an accident

These are just a few of the things I have seen that are common among idiot drivers on the road. The worst I ever saw was when some doofus made a left turn and went over an island deliberately just because he didn't want to make a right and turn around. But most peoples' brains haven't degenerated yet to that level of dementia so I might ask the following: if you fit any of the categories above, did environment make you this stupid or is it something genetic? Oh, and can you explain with some degree of logic why you do these stupid things?