alt Hacker News> However I get the impression that other drivers are less considerate around a car displaying the [L] sign.
On a related theme - I have found when driving in the North Eastern US, when people put on their turn signal, other drivers will often speed up and close the gap rather than giving them space to merge.
As a northeasterner, I can explain:
In some other places, a turn signal before a lane change is an ask, to which others respond by creating more of a gap than there originally was. Here, it's not an ask but a statement that you've got enough of a gap already so you're going for it. As such, others don't find a need to react at all, which could mean the gap continues shrinking if it was already shrinking prior.
The signaler needs to have anticipated it and not signaled until this problem doesn't exist, in fact it's scary when someone signals despite this problem because the other driver is led to believe they're unseen. When there's already a lot of momentum toward closing the gap, continuing to do so is a more fuel-efficient way out of the blind spot than using the brake pedal.
Aside: turn signals that automatically flash 3 times with no reasonable way to cancel the remaining flashes when you discover a need to abort a lane change exacerbates the aforementioned scare, so I recommend disabling it.