If you speed in the left you are also technically violating the law and in many more places than you would be violating it by doing the speed limit in the left lane.
So yes, people going at the speed limit are violating the law in some places (which I never disputed so you can kindly stop pointing it out repeatedly) but they are not particularly dangerous unless mixed with other people violating the law.
When speeding in a residential area the danger created by a single driver. When traveling in the left lane this is rarely the case, ergo you are arguing from personal annoyance than any regards for the danger created by the driver.
I was attempting to be informative; someone stated that it wasn't their job to be "accommodating". Legally, you are absolutely supposed to be accommodating in many states by staying out of the left hand lane when it isn't necessary for passing or turning. Not sure what you mean by "repeatedly", as that was the first time I posted on this issue.
Again, your last point is correct. It's more dangerous to speed in a residential zone. I wasn't taking issue with it.