Luckily, this is something that I don't have to deal with very often, and I can imagine most others don't as well. Still, it is pretty annoying and
inconsiderate when someone doesn't know where they're going, and instead of letting other people get by them, they drive around all erratically... crawling
along, randomly braking, starting to turn off and then realizing they're not supposed to turn there, etc.
If you are lost, or unsure of where you need to go, either try not to make it obvious (i.e. don't drive erratically) or pull over and let people pass you
before you start chugging around at half the speed limit again. Like our man Charles Barkley would say... anything less would be uncivilized!