I thought we had a thread specific to road-related things that bother us, but I've been unable to find it.
Road-related pet peeves
That's a good one. I'd be OK with merging this discussion there, although with my list having grown to nearly a dozen items, I'm not sure we can really count
all of them as pet peeves.

Not using the shoulder to pass left turning vehicles when it's wide enough to do so
Illegal in some states.
...
I hate to go so obvious here, but... speeding is also illegal but simultaneously widely accepted. In certain circumstances, there's no good reason why the shoulder line should not be crossed, just like in certain circumstances there's no good reason the speed limit should not be exceeded. I am in favor of double lines being legally enforceable, but single lines
not being legally enforceable. They're there as a guide, not a fence.
Using the shoulder in the way you describe is not necessarily legal everywhere.
It's not even legal in New York state. People just ignore that law around here.
Indeed, like the speed limit, it's so widely ignored that the drivers that
don't ignore it are the ones that stand out.
Blocking the right lane at a red light when the left lane is open
"Blocking"? How do you know that driver isn't planning to make a right turn a half-block after the stoplight? Besides which, I keep right except to pass as a general rule; what do you expect me to do? change lanes every time I see a red light? and then be in the way of a faster driver behind me when the light turns green?
This is one where I recognize that my personal bar for efficiency is a lot higher than most other drivers, and I'm OK with that. In this case, I would say that, as long as I can see (and therefore monitor) the light on the cross street and am aware of any protected phases, I'm confident in my ability to easily get in front of anyone in the right lane and move right in time to make the turn, and I would rather do that than inconvenience someone behind me waiting to turn right.
There are certainly some exceptions, such as areas/intersections I'm unfamiliar with, right turns immediately beyond an intersection, and locations with wide shoulders that can be used for right turns, but in general, when approaching a red light with no one in front of me, where my presence in the right lane would block a right turning vehicle, I try to move left if practical.*
Likewise, I don't regard someone coming up faster behind me as an issue because, with anticipation, I can get enough of a jump start to be clear of any vehicles on my right and move right within a few hundred feet anyways.
*See next post