So had a fight with my mother today about whether I'm a left-hand-lane-driving asshole. There are three cases when I don't move right on a highway even if I'm not passing someone immediately (not counting gaps I consider unsafe to even enter), and all of them involve attempts to pass them.
1. I'm behind a long line of cars in the left lane overtaking cars in the right, and want to be going at least as fast as that line. I cannot pass those cars any faster than I am then, as I see it I'm in line to overtake the cars on the right.
2. I'm behind a long line of cars, and there's a gap which is slowly growing, but I'm not sure I could pass the slow cars in ahead of me in left lane on the right before the gap catches up with righthand traffic. At least one time my mother told me I should have passed some cars ahead of me on the right but I wasn't sure I could make it. I find it odd that she was annoyed about that but also other things I do that she thinks are too risky.
3. I'm passing cars on the right at a consistent clip, and there's not a stretch I'd be in longer than half a minute or so if I moved to the right, and there's no car that's been following on my tail. (If there are cars on my tail I will move over in between passings on the assumption that either they'll pass me or they're driving the same speed as I was and I can regain my spot.) However changing lane is dangerous, and I see no reason to do it twice in a half-minute period just because someone might appear behind me in that half minute. If they do, I'll pull over at the next reasonably-sized gap on the right. (Or I would except that usually try to leave space before I pull it the right lane, and the kind of person who appears on the tail of someone already driving 10-15 MPH above the speed limit in such a short period is also the sort of person who will pass me on the right before I'm comfortable getting over myself.)
The argument started when a guy passed me on the right in a gap that I wouldn't have felt comfortable entering, much less passing, I commented on it, and my mother said that he wouldn't have needed to pass me on the right if I didn't ride the left lane. After that we argued about it, and she kept claiming that I was riding the left lane mostly in those three scenarios, except one case where I'd already signaled I was getting over and was waiting until I was well ahead of the semi truck.
So tell me guys: are the scenarios I described clear? And if so, who's being unreasonable? Me, my mother, or both of us?