Yep, I’ll roll up behind someone, give them a few seconds to move on their own, and if they don’t I’ll give them a single flash of the highs. If they still don’t move over, and there is no reason for them to be in the left lane I’ll shoot around on the right and make sure to merge back in front plenty early… like withing a foot or so, hoping to convince the left lane blocker that maybe they’re in the wrong place. Yes, I know it’s wrong, but those people piss me off more than anything else on the highway.